Lepine ca.1778, Paris
(Dom Bedos de Celles illustration)
Buntebart & Sievers, 1787 London
Broadwood & Son, 1804
(1783 patent)
Walter, ca. 1790, Vienna
Petzold patent 1806, Paris
Thom and Allen patent, 1820
(Eng. 4,431)
Wilkinson cabinet, London
(Southwell patent 1807)
Martin, 1825, Madrid
Osborn ca.1825, Boston
(Dwight patent Am. 1824.07.29)
Broadwood, 1825, London
Pape patent 1826.03.20, Paris
Broadwood, 1827, London
(Eng. 5,261)
Erard patent 1827.04.04, Paris
Chickering ca. 1828, Boston
Pape patent 1828, Paris
Petzold patent 1829.09.03, Paris
Penniman illustration ca. 1830, Boston
Montal illustration, 1834, Paris
Loud patent, 1835, Philadelphia
(Am. 1825.07.07)
Babcock ca. 1835, Philadelphia
(Am. 1825.12.17)
Chickering, ca. 1837, Boston
(Am. 1828.08.14)
Wornum, ca. 1838, London
(Eng. 4,460)
Klinkerfuss ca. 1840, Stuttgart
Wornum, ca. 1840, London
(Eng. 4,460)
Wornum, 1841, London
Herz patent 1843, Paris
(Fr. 12,372)
Chickering, ca. 1843, Boston
Pape ca. 1849, Paris
Mathushek patent, 1851
(Am. )
Pleyel illustration, 1844, Paris
Pape, ca. 1855, Paris
Wornum ca. 1850
(En. 9,262)
Klepfer patent, 1851, Cincinnati
(Am. 8,002)
H. Lichtenthal ca. 1850, St. Petersburg
(Oscar Paul illustration)
Stodart ca.1855, New York
Chickering, ca. 1855, Boston
(Am. 3,238)
Chickering, ca. 1857, Boston
Chickering ca.1857
Hallett and Cumston, ca. 1860, Boston
Hallet, Davis & Co., ca. 1860, Boston
(Am. 8,383)
Steinway, New York
Steinway, ca. 1860, New York
(Am. 26,532)
Bluthner illustration, Leipzig
Mathushek patent 1860, New York
(Am. 30,279)
Mathushek, New Haven
(Am. 35,704)
Simpson, ca. 1876, New York
W. H. Davies, ca. 1878, Liverpool,
Steinway illustration, ca. 1881, New York
Rogers, ca. 1885, Boston
(Am. 331,825)
Chickering, ca. 1888