Steinway & Sons Piano Patents (1950 - 2000)

A Tradition of Superior Design Innovations
Date
Patent Name
Improvement
Inventor
1950
Diaphragm Unit and Method of Fabricating Same
Improvement of previous patent.
Paul H. Bilhuber
1953
Diaphragm Unit and Method of Fabricating Same
Improvement of previous patent.
Paul H. Bilhuber
1955
Grand Piano
Design for grand piano.
Walter Dorwin Teague, Charles A. Jerabek
1959
Grand Piano Action With Means for Adjusting the Touch Weight Resistance of the Keys
Improvement of previous patent.
Walter Günther
1959
Means for Adjusting the Touch of Keys in Pianos and Like Musical Instruments
Improvement of previous patent.
Walter Günther
1963
Wrestplanks
Improvement of pinblock.
Frank H. Walsh
1966
Piano Action Bushing Assembly
Introduction of "permafree" (fluorocarbon resin) bushings.
Theodore D. Steinway
1976
Introduction of elastomeric resin busings.
Joseph J. Pramberger
1983
Invention for manufacturing bearings using "permagree" bushings.
Walter D. Drasche
1991
Grand Pianos
New design for Steinway's 500,000th grand piano.
Wendell K. Castle
1992
Design of hammer felt infused with an acrylic copolymer.
James M. Lombino
1993
Design of special ivory key cover replacement.
Salvadore J. Calabrese; Henry A. Scarton; S. Frank Murray; Christopher M. Ettles; Warren C. Kennedy; Saim Dinc; Bessem Jlidi; William Strong
1996
Innovations for using synthetic materials.
Salvadore J. Calabrese; Henry A. Scarton; S. Frank Murray; Christopher M. Ettles; Warren C. Kennedy; Saim Dinc; Bessem Jlidi; William Strong
1996
The design of a knuckle assembly for an escapement action.
Marvin S. Jones; Dirk Dickten; Gary M. Green; Paul Oleksy; Gregory R. Sims; Ludwig Tomescu; Robert C. Berger
1997
Design of a way for adjusting key height.
William S. Youse
1999
Further design of a knuckle assembly for an escapement action.
William S. Youse; Marvin S. Jones; Stephan Knupher
2000
Innovation on the sostenuto pedal.
Marvin S. Jones; Peter M Barna; William S. Youse; Anthony C. Arena; Michael Mohr

Sources
Ratcliffe, Ronald and Stuart Isacoff. Steinway. San Francisco: Chronicle Books, 2002.