| pn/ | in/ | ttl/ | isd/ | ccl/ | an/ | (witnesses) |
| x5980 | C. P. Seabury | | 1830.05.20 |
| x6544 | J. F. Nunns | | 1831.05.05 |
| 790 | D. Walker | Improved Mode of Constructing the Wrest-pin for Forte Pianos | 1838.06.19 | 84/205 | | Owen G. Warren, Lorenzo F. Warren |
| 1379 | H. Herrick | Piano Action | 1839.10.26 | 84/237 | | Thos. P. Jones, George West |
| 3504 | O. Gori, P. Ernst | Musical Parts of Pianos | 1844.03.26 | 84/403 ; 209/365.2 | | T. A. Wakeman, Wm. Serrell |
| 4282 | W. F. Senior | Piano Bottom | 1845.11.21 | 84/186/1 | | Jas. Pirsson, Julian G. Davies |
| 4832 | J. Schriber | Piano | 1846.10.29 | 84/174 ; 84/186.1; 84/192; 84/200; 84/255 | | S. W. Bennett, Geo. G. Hicks |
| 7292 | J. Ruck | Piano Action | 1850.03.16 | 84/237 ; 84/236 | | O. D. Munn, S. H. Wales. |
| 7308 | J. Ruck | Piano | 1850.04.23 | 84/174 ; 84/186.1; 84/209 | | O. D. Munn, El Polhamus |
| 7568 | J. Pirsson | Piano | 1850.08.13 | 84/175 ; 84/235 | | S. H. Maynard, Thomas H. Wood |
| 7976 | J. Ruck | Piano Action | 1851.03.11 | 84/237 | | O. D. Munn, Jno. N. Westervelt. |
| 8320 | G. Bacon, R. Raven | Stringing Pianos | 1851.08.26 | 84/210 | | D. B. Taylor, John Ryon |
| 8350 | R. Kreter | Pianoforte-action | 1851.09.09 | 84/237 | | A. P. Browne, C. Browne |
| 8452 | H. J. Newton | Improvement in Piano-forte Strings | 1851.10.21 | 428/673 ; 428/686; 84/199 | | Abr. Porter Brown, C. Austin Brown. |
| 8470 | F. Mathushek | Stringing Pianos | 1851.10.28 | 84/197 | | O. D. Munn, S. H. Wales. |
| 8587 | R. M. Ferris | Flute and Viol d'Armour Attachment | 1851.12.16 | 84/172 ; 84/424 | | O. D. Munn, R. W. Fenwick. |
| 9014 | W. Compton | Stringing Pianos | 1852.06.15 | 84/209 ; 56/455 | | James H. Williams, Wm. D. Booth. |
| 9287 | A. Speer and E. Marx | Sounding-board of Pianofortes, &c. | 1852.09.28 | 84/174 ; 310/32; 84/192 | | O. D. Munn, Thos. Mahon. |
| 9304 | Jas. McDonald, Jno. McDonald | Piano Attachment | 1852.10.05 | 84/172 | | A. D. Munn, S. H. Wales. |
| 9526 | R. Kreter | Covering Piano-forte Hammers | 1853.01.04 | 144/29 ; 144/278.1; 84/236 | Nunns & Clark | Henry Nunns, S. H. Maynard. |
| 9988 | W. Compton | Stringing Pianos | 1853.09.06 | 84/213 | | Lemuel W. Terrell, Thomas G. Harold. |
| 11852 | A. Bassford | Key for Tuning Pianofortes | 1854.10.31 | 84/459 | | Wm. H. Bishop, Andrew De Lacy. |
| 12432 | H. S. Ackerly | Piano Frame | 1855.02.27 | 84/188 ; 84/174 | | S. H. Walls, I. G. Mason. |
| 13236 | A. Stoeckel | Machine for Cutting Legs for Pianos, Tables, &c. | 1855.07.10 | 142/37 ; 144/138; 144/144.1; 451/237 | | Jos. Geo. Mason, Wm. Tusch. |
| 13580 | J. S. Morton | Piano Action | 1855.09.18 | 84/237 | | Jos. Geo. Mason, J. W. Coombs. |
| 13924 | F. Taylor | Piano Action | 1855.12.11 | 84/237 | | Lemuel W. Serrell, Thomas G. Harold. |
| 14948 | W. Clark | Attachment for Piano-legs | 1856.05.27 | 248/188 ; 126/85R | | Lemuel W. Terrell, T. G. Harold. |
| 14998 | J. Becker | Piano-forte Action | 1856.06.03 | 84/174 ; 84/240; 84/423R | | Henry W. Clark, Gerardus Clark. |
| 17238 | H. Steinway, Jr. | Pianoforte Action | 1857.05.05 | 84/237 | | W. Tusch, J. W. Coombs. |
| 17320 | S. B. Driggs | Pianoforte Action | 1857.05.19 | 84/435 ; 84/436 | | S. H. Wales, W. Tusch. |
| 19081 | S. B. Driggs | Piano Sounding Board. | 1858.01.12 | 84/194 | | W. Tusch, I. W. Combs. |
| 19857 | H. A. Leaman | Pianoforte-action | 1858.04.06 | 84/240 | | W. Tusch, W. Hauff. |
| 20595 | H. Steinway | Piano Action | 1858.06.15 | 84/237 | | Wm. Tusch, W. Hauff. |
| 23834 | S. B. Driggs | Piano | 1859.05.03 | 84/212 | | Wm. Tusch, S. F. Cohen. |
| 24119 | N. J. Haines | Improvement in Piano-forte Actions | 1859.05.24 | 84/237 | | Wm. Tusch, W. Hauff. |
| 24294 | F. Gelin, C. Gelin | Piano Castor | 1859.06.07 | 84/191 ; 16/18CG; 16/41 | | Thomas D. Stetson, Jno. Ward. |
| 24404 | J. Hoffacker, J. Richards | Key, &c., of Pianofortes | 1859.06.14 | 84/237 ; 84/423B | | Charles Wekle, Jul. Wekle. |
| 24905 | J. U. Fischer | Piano Action | 1859.06.26 | 84/13 | himself and Charles S. Fischer | Lemuel W. Terrell, Thos. Geo. Harold. |
| 25305 | T. Marschall | Piano Action | 1850.08.30 | 84/237 | Lighte & Bradburys | James H. Gridley, W. Wurzbach. |
| 25393 | D. Decker | Piano Action | 1859.09.13 | 84/237 | | F. O. Degener, John J. Decker. |
| 25426 | F. C. Lighte | Piano | 1859.09.13 | 84/189 | | O. D. Mumo, Geo. H. Geib. |
| 25919 | T. S. Seabury | Piano Action | 1859.10.25 | 84/237 | R. Gorsuch | S. A. Mount, Wm. S. Mount. |
| 26300 | H. Steinway, Jr. | Stringing Pianos | 1859.11.29 | 84/211 | | R. S. Spencer, J. W. Coombs. |
| 26503 | J. G. Kunze | Piano | 1859.12.20 | 84/175 ; 84/198; 84/212 | | Henry E. Roeder, Louis Blegert. |
| 26532 | H. Steinway, Jr. | Grand Piano | 1859.12.20 | 84/197 | | R. S. Spencer, R. S. Campbell. |
| 26550 | F. Mathushek | Piano Action | 1859.12.20 | 84/237 | himself and Wellington Wells | J. T. Mills, F. J. Tucker. |
| 26909 | J. Kohnle | Piano Action | 1860.01.24 | 84/237 | | Chs. Wehle, Jul. Wehle. |
| 27226 | F. C. Lighte | Grand Pianoforte | 1860.02.21 | 84/188 | | M. M. Livingston, Geo. H. Geib. |
| 27435 | S. B. Driggs | Pianoforte | 1860.03.13 | 84/212 ; 84/214 | | Wm. Thompson, B. Grioux. |
| 28352 | W. Compton | Piano Action | 1860.05.22 | 84/237 | | Lemuel W. Serrell, Chas. H. Smith. |
| 29061 | W. Compton | Bridge for Pianos | 1860.07.10 | 84/214 ; 84/215 | | Lemuel W. Serrell, Chas. H. Smith. |
| 29068 | J. U. Fischer | Pianoforte | 1860.07.10 | 84/174 ; 381/427; 56/400; 84/185 | | Lemuel W. Serrell, Chas. H. Smith. |
| 29502 | H. Lindeman | Piano | 1860.08.07 | 84/186.1 | | Henry E. Roedbr, Louis Koch. |
| 29522 | C. J. Schoenemann | Pianoforte-Key | 1860.07.07 | 84/427 | | Lewis W. Bendre', M. M. Livingston. |
| 30279 | F. Mathushek | Pianoforte | 1860.10.02 | 84/174 | himself and Wellington Wells | J. T. Mills, Francis J. Tucker. |
| 32119 | C. F. Chickering | Improvement in Square Piano-fortes | 1861.04.23 | 84/184 ; 48/186; 84/186.1 | | J. W. Coombs, R. S. Spencer. |
| 32386 | H. Steinway, Jr. | Pianoforte Action | 1861.05.21 | 84/239 ; 84/237 | | M. M. Livingston, C. W. Crotau. |
| 32387 | H. Steinway, Jr. | Pianoforte-Action | 1861.05.21 | 84/237 | | M. M. Livingston, James Laird. |
| 33427 | H. S. Calenberg | Piano Action | 1861.10.08 | 84/237 | | James Laird, G. W. Reed. |
| 33633 | J. D. Boedicker | Piano-forte Action | 1861.11.05 | 84/237 | | Henry E. Roeder, John Thomas Davidson. |
| 34114 | T. Marschall | Stringing Pianos | 1862.01.07 | 84/213 | | N. B. Mountfort, Th. Warker. |
| 34220 | M. Stange | Stringing Pianos | 1862.01.21 | 84/197 | | James Laird, Richardson Gawley. |
| re1271 | H. Steinway, Jr. | Improvement in Piano-forte Actions | 1862.02.04 | 84/237 | | James Laird, M. M. Zivingston. |
| 34491 | A. H. Hastings | Pianos | 1862.02.25 | 84/174 ; 84/176; 84/254 | | Wm. S. Rittenhouse, A. D. Welch, M. W. Corin. |
| 34910 | H. Steinway, Jr. | Improvement in Piano-forte Actions | 1862.04.08 | 84/237 | | O. D. Munn, E. W. Hodgson. |
| 35484 | H. Worcester | Improvement in Iron Frame of Pianos | 1862.06.03 | 84/188 | | Wm. H. Bird, J. McFarland. |
| 35766 | F. C. Lighte | Stringing Pianos | 1862.07.01 | 84/214 ; 84/213 | | James Laird, Edwd. W. Hodgson. |
| 37217 | R. W. Carpenter | Combination of Reed Instrument with the Piano-forte | 1862.12.23 | 84/172 ; 84/423R; 84/431 | | M. S. Partridge, Timothy Shine. |
| 38731 | D. Decker | Piano | 1863.06.02 | 84/188 | | Daniel Robertson, M. S. Partridge. |
| 40384 | R. A. Tooker | Improvement in String-bearing for Piano-fortes | 1863.10.20 | 84/214 ; D19/11; D19/26; D19/27 | himself and William B. Bradbury, of Bloomfield, New Jersey | Thos. S. J. Douglas, D. Robertson. |
| 41977 | S. B. Driggs | Piano | 1864.03.22 | 84/174 ; 84/209; 84/212 | | Thos. L. J. Douglas, M. M. Livingston. |
| 42518 | M. Vergnes | Portable Piano-forte | 1864.04.26 | 84/238 | | Owen G. Warren, J. D. Sturtevant. |
| 43174 | W. W. Batchelder | Piano Sounding Board | 1864.06.21 | 84/192 | | Lemuel W. Serrell, Chas. H. Smith. |
| 43245 | M. Vergnes | Portable Piano Forte | 1864.06.21 | 84/238 | | Owen G. Warren, J. D. Sturtevant. |
| 44566 | M. Vergnes | Piano Action | 1864.10.04 | 84/238 ; 84/217 | | Wm. H. Riblet, Ben. G. Warren. |
| 45818 | D. Decker | Stringing Pianos | 1865.01.10 | 84/211 | | Henry T. Brown, J. W. Coombs. |
| 45943 | M. Vergnes | Piano Attachment | 1865.01.17 | 84/170 | | A. Vergnes, Owen G. Warren. |
| 47196 | S. B. Driggs | Improvement in Pianofortes | 1865.04.11 | 84/213 ; 84/189 | | Henry T. Brown, J. W. Coombs. |
| 47349 | S. Walker | Piano Lock | 1865.04.18 | 70/81 ; 292/140; 70/100; 70/DIG.68 | | L. M. Doudna, J. P. Kaisser. |
| 48565 | F. Koth | Piano-forte Action | 1865.07.04 | 70/81 ; 292/140; 70/100; 70/DIG.68 | | Henry E. Rohder, E. W. Bogardus. |
| 51559 | A. Choplain, P. E. Chollet | Improvement in Stringing Pianos | 1865.12.19 | 84/197 | | D. C. Coutard, H. Goulet. |
| 51588 | M. Herter | Improvement in Piano-forte Actions | 1865.12.19 | 84/251 | | Ang. Temmedinger, Jacob Schen. |
| 52725 | A. Ludolff | Improvement in Iron Frames for Piano-fortes | 1866.02.20 | 84/188 | | Henry E. Roeder, David Mosh. |
| 55385 | W. Steinway | Improvement in Piano-fortes | 1866.06.05 | 84/184 ; 84/196; 84/212 | | M. M. Livingston, W. Hauff. |
| 57186 | R. Raven | Piano Sounding Board | 1866.08.14 | 84/194 | | Wm. F. McNamara, Albert W. Brown. |
| 57225 | M. Vergnes | Apparatus for Augmenting Sound in Piano-fortes | 1866.08.14 | 84/194 | | Owen G. Warren, Lewis H. Moore. |
| 57434 | J. J. Bender | Improvement in Double-action Pianos | 1866.06.21 | 84/238 ; 84/175 | himself, George Meuller, and Henry J. Bangs | Henry J. Bangs, A. Neill. |
| 57743 | M. Martin | Improvement in Metal Frames for Pianos | 1866.09.04 | 84/185 | | M. Dean Overell, M. M. Livingston. |
| 57912 | A. De Kuhn | Sounding-board for Pianos | 1866.09.11 | 84/194 | | M. M. Livingston, C. S. E. Topliff. |
| 59295 | W. V. Wallace | Piano-forte Action | 1866.10.30 | 84/243 ; 84/452R | | A. B. Stoughton, Edm. F. Brown. |
| 59619 | G. C. Manner | Improvement in Piano-fortes | 1866.11.13 | 84/217 | | Wm. F. McNamara, Alex. F. Roberts. |
| 60519 | G. H. Hulskamp | Stringing Pianos | 1866.12.18 | 84/211 | | Elisha Foote, Ed. Callon. |
| 61612 | J. J. Decker, D. Decker | Improvement in Piano-fortes | 1867.01.29 | 84/188 ; 84/209 | | Wm. H. Kipp, H. C. Jageman. |
| 63546 | C. E. McDonald | Improvement in Prop-sticks for Piano-fortes | 1867.04.02 | 217/60R | | Hubbard Hendrickson, W. H. McDonald. |
| 63547 | W. H. McDonald | Improvement in Piano-fortes | 1867.04.02 | 217/60B | | J. W. Coombs, G. W. Reed. |
| 64407 | P. E. Chollet | Stringing Pianos | 1867.05.07 | 84/207 ; 84/197 | | William T. Welles, A. Sidney Doane. |
| 69329 | C. T. Faber | Improved Self-adjusting Lid-support for Pianos, Desks, &c. | 1867.10.01 | 217/60R ; 217/60C | | W. W. Underhill, C. Veitenheimer. |
| re3004 | G. C. Manner | Improvement in Piano-fortes | 1868.06.23 | 84/188 | | Alex F. Roberts, A. R. Haight. |
| 81306 | T. Steinway | Improvement in Piano-fortes | 1868.08.18 | 84/250 | | W. Hauff, E. F. Kastenhuber. |
| 83734 | N. B. Sherwood | Improvement in Piano-forte-tuning Keys | 1868.11.03 | 84/250 | himself and W. H. Willson | A. Le Clerc, E. P. Tracy. |
| 84844 | C. Sangalli | Hand-supporter for Pianos, &c. | 1868.12.08 | 84/469 | | E. Howard, R. Laporta. |
| 85889 | A. V. T. Barberie | Treble Attachment for Piano-fortes | 1869.01.12 | 84/209 | | Chas. H. Smith, Geo. T. Pinckney. |
| 85965 | T. G. V. Roz | Auxiliary Key-Board for Pianos, &c. | 1869.01.19 | 84/425 | | Chas. H. Smith, Geo. T. Pinckney. |
| 87509 | D. T. Peek | Improvement in Piano-Fortes | 1869.03.02 | 84/189 ; 84/174; 84/196 | | W. Hauff, E. F. Kastenhuber. |
| 87834 | E. F. French | Improvement in Locks for Pianos, &c. | 1869.03.15 | 70/81 | | Frank Blockley, James T. Graham. |
| 88488 | R. J. Jordan | Improvement in Piano-locks | 1869.03.30 | 70/81 ; 70/128; 70/DIG.78 | | Frank Blockley, James T. Graham. |
| 88749 | C. F. T. Steinway | Improvement in Sound-boards for Piano-fortes | 1869.04.06 | 84/212 | | W. Hauff, E. F. Kastenhuber. |
| 88967 | L. La Fayette | Melodeon Attachment for Piano-fortes | 1869.04.13 | 84/172 | | H. L. Wattenberg, A. R. Haight. |
| 88970 | R. Marschall | Improvement in Piano-fortes | 1869.04.13 | 84/210 | | W. Hauff, Ernest F. Kastenhuber. |
| 90150 | E. Bloomfield, D. P. Otis | Improvement in Piano-fortes | 1869.05.18 | 84/210 | | Frank Blockley, E. Greene Collins. |
| 90805 | H. Ahrend | Improved Lock for Piano, &c. | 1869.06.01 | 70/82 | | W. Hauff, E. F. Kastenhuber. |
| 93473 | C. A. Peterson | Improvement in Piano-fortes | 1869.08.10 | 84/213 | | Frank Blockley, C. L. Topliff. |
| 93647 | T. Steinway | Improvement in Piano-forte Actions | 1869.08.10 | 84/239 ; 84/250 | | W. Hauff, E. F. Kastenhuber. |
| 97845 | H. Willgohs | Improvement in Making Piano-legs | 1869.12.14 | 84/177 | | Joseph H. Toone, Conrad Narvaen. |
| 97943 | G. C. Manner | Improvement in Upright Pianos | 1869.12.14 | 84/174 ; 84/196 | | Chas. A. Pettit, Solon C. Kemon. |
| 97982 | C. F. T. Steinway | Improvement in Piano-fortes | 1869.12.14 | 84/184 | | W. Hauff, E. P. Kastenhuber. |
| 100888 | A. H. Hastings | Damper for Piano-fortes | 1870.03.15 | 84/240 | | E. Tate, Alex F. Roberts. |
| 100848 | G. Steck | Improvement in Iron Frames for Upright Pianos | 1870.03.15 | 84/188 ; 84/176 | | Henry E. Roeder, John Christ. |
| 102668 | G. Ely | Improvement in Piano-fortes | 1870.05.03 | 84/187 ; 84/211 | | E. F. Kastenhuber, John A Wiedersheim. |
| 104417 | J. M. Branig | Tuning-pin for Pianos | 1870.06.21 | 84/204 | | Geo. W. Mabee, Alex. F. Roberts. |
| 105049 | D. Decker | Improvement in Former for Bending and Gluing the Cases of Grand Pianos | 1870.07.05 | 144/259 | | Henry T. Brown, Henry Palmer. |
| 106227 | G. Steck | Improvement in Iron Frames for Pianos | 1870.08.09 | 84/188 | | Henry E. Roeder, J. S. Brown. |
| 109172 | O. Bull | Improvement in Pianos | 1870.11.15 | 84/184 ; 84/177; 84/192; 84/195; 84/212 | | Thomas D. Stetson, C. C. Livings. |
| 113073 | F. Mathushek | vImprovement in Pianos | 1871.03.28 | 84/186.1 ; 84/198 | | Frank B. Curtis, John M. Hyne. |
| 113074 | F. Mathushek | Improvement in Piano-forte Actions | 1871.03.28 | 84/236 ; 84/432 | | Frank B. Curtis, John M. Hyne. |
| 115053 | A. H. Hastings | Improvement in Front Falls for Pianos | 1871.05.23 | 84/180 | | Geo. W. Mabee, T. B. Mosher. |
| 115782 | C. F. T. Steinway | Improvement in Piano-actions | 1871.06.06 | 84/237 ; 84/221; 84/253 | | W. Hauff, R. F. Kastenhuber. |
| 116109 | G. Steck | Improvement in Grand Pianos | 1871.06.20 | 84/188 | | Henry E. Roeder, J. S. Brown. |
| 117393 | J. B. Dunham | Improvement in Prepared-wood Sounding-boards for Pianos | 1871.07.25 | 84/193 ; 84/294 | | Geo. H. Geib, E. G. Collins |
| 119184 | S. Schoenbrun | Improvement in Attachments for Piano-pedals | 1871.09.19 | 84/230 | | E. F. Kastenhuber, Walter B. Wines. |
| 119760 | A. H. Hastings | Improvement in Piano-forte | 1871.10.10 | 84/205 | | E. P. Martin, T. B. Mosher. |
| 121077 | D. L. Bollermann | Improvement in Hammer Flange Butts of Piano Actions | 1871.11.21 | 84/251 | Jesse. J. Davis, Brooklyn | Wm. S. Geurineau, Wm. H. Drake. |
| 121334 | C. F. Chickering | Improvement in Upright Pianos | 1871.11.28 | 84/240 ; 84/236; 84/255 | | A. V. Briesen, T. B. Mosher |
| 121686 | E. L. Taylor | Improvement in Sounding-boards for Pianos | 1871.12.05 | 84/190 | | James T. Graham, T. B. Mosher. |
| 124470 | O. Altenburg | Improvement in Upright Pianos | 1872.03.12 | 84/180 | | T. B. Mosher, Alex. F. Roberts. |
| 124912 | T. Powers | Improvement in Locks for Pianos, &c. | 1872.03.26 | 70/83 ; 70/DIG.78 | himself and Lewis Crooke | Thos. P. How, Wm. Donnelly. |
| 126848 | C. F. T. Steinway | Improvement in Duplex Agraffe Scales for Piano-fortes | 1872.05.14 | 84/198 | himself, Albert Steinway, and William Steinway | W. Hauff, E. F. Kastenhuber. |
| 127383 | C. F. T. Steinway | Improvement in Piano-fortes | 1872.05.28 | 84/184 | himself, Albert Steinway, and William Steinway | W. Hauff, E. F. Kastenhuber. |
| 127384 | C. F. T. Steinway | Improvement in Piano-fortes | 1872.05.28 | 84/174 ; 84/196; 84/212 | himself, Albert Steinway, and William Steinway | W. Hauff, E. F. Kastenhuber. |
| 129727 | P. Gmehlin | Improvement in Piano-fortes | 1872.07.23 | 84/210 | | A. V. Briesen, T. B. Mosher. |
| 134194 | C. F. Chickering | Piano Agraffes | 1872.12.24 | 84/211 | | James T. Graham, T. B. Mosher. |
| 134886 | C. W. Held, Jr., A. M. Baugh | Improvement in Pedal-attachments for Pianos | 1873.01.14 | 84/232 | | T. B. Mosher, Alex, T. Roberts. |
| 135820 | L. Kuhner | Piano Actions | 1873.02.11 | 84/240 | | W. Hauff, E. F. Kastenhuber. |
| 135857 | C. F. T. Steinway | Improvement in Piano Sounding-boards | 1873.02.11 | 84/195 | himself, William Steinway, and Albert Steinway | Tho. Stevenson, F. W. Hare. |
| 137005 | R. Kreter | Improvement in Upright Piano Actions | 1873.03.18 | 84/250 ; 84/243 | David Decker and John J. Decker | Fred. Haynes, Ferd. Tusch. |
| 137377 | G. C. Manner | Upright-Piano Actions | 1873.04.01 | 84/236 | | C. Sedgwick, T. B. Mosher |
| 140428 | E. G. Newman, P. Anderson | Improvement in Piano-actions | 1873.07.01 | 84/241 ; 84/253 | | Fredrik Teuk, Ernst Johansen. |
| 140528 | E. P. Needham | Improvement in Keys for Piano-fortes, Organs, &c. | 1873.07.01 | 84/437 | | Henry T. Brown, Michael Ryan. |
| 141152 | G. C. Manner | Improvement in Pianos | 1873.06.22 | 84/185 ; 84/197 | | Michael Ryan, A. V. Briesen. |
| re5470 | G. C. Manner | Upright Pianos | 1873.07.01 | 84/174 ; 48/186; 84/196 | | A. V. Briesen, Alex F. Roberts |
| 142194 | W. W. Bennett | Improvement in Piano-fortes | 1873.08.26 | 84/210 | | George H. Bennett, Roger W. Bennett. |
| 143789 | G. Steck | Improvement in Grand Pianos | 1873.10.21 | 84/188 | | Henry E. Roeder, John B. Panner. |
| 143986 | F. Koth | Improvement in Piano-actions | 1873.10.28 | 84/237 | | Otto Laenge, Arthur Neill |
| 149879 | R. Kreter | Improvement in Piano-actions | 1873.12.23 | 84/239 | | Michael Ryan, Fred. Haynes. |