| Patent Number |
Date |
Inventor |
Invention |
| 2031748 |
Feb. 25, 1936 |
F. A. Vietor |
Key Leading (Acc. Action) |
| 2048368 |
July 21, 1936 |
P. H. Bilhuber |
Steel Capo Rib |
| 2051633 |
Aug. 18, 1936 |
P. H. Bilhuber |
Diaphragmatic Soundboard and Mounting |
| 2070391 |
Feb. 9, 1937 |
P. H. Bilhuber |
Diaphragmatic Soundboard and Mounting |
| Des 104302 |
Apr. 27, 1937 |
W. Zaiser |
Upright Case Design |
| DRP 647554 |
July 7, 1937 |
P. H. Bilhuber |
Duplex Scale |
| DRP 707489 |
Aug. 15, 1937 |
P. H. Bilhuber |
Return Soundboard |
| 2107659 |
Feb. 8, 1938 |
P. H. Bilhuber |
Grand Return Soundboard |
| 2121008 |
June 21, 1938 |
P. H. Bilhuber |
Loudspeaker Mounting |
| Des 111101 |
Aug. 30, 1938 |
Everett Worthington |
Piano Design |
| Geb 1450252 |
Sept. 23, 1938 |
Steinway & Sons Hamburg, Germany |
Touch Weight Regulating Device |
| 2134680 |
Nov. 1, 1938 |
Dunbar Beck |
Grand Top Sound Deflector |
| Des 113628 |
Mar. 7, 1939 | Eric Gugler |
White House Case |
| Des 113629 |
Mar. 7, 1939 |
Eric Gugler |
White House Lyre |
| Des 113630 |
Mar. 7, 1939 |
Eric Gugler |
White House Leg |
| 2338992 |
Jan. 11, 1944 | P. H. Bilhuber |
Operating Means for Piano Actions |
| 2339752 |
Jan. 25, 1944 |
P. H. Bilhuber |
Piano Pin Block |
| 2345025 |
Mar. 28, 1944 |
George Beiter |
Securing Means for Adhesively Held Parts |
| 2384347 |
Sept. 4, 1945 | Michael Schutz |
Cage Nut Tool |
| Can 430209 |
Sept. 25, 1945 |
P. H. Bilhuber |
High Frequency Molding |
| Can 431548 |
Nov. 27, 1945 | P. H. Bilhuber |
Apparatus for Edge Gluing Strip Elements |
| GB 585591 |
Feb. 12, 1947 |
P. H. Bilhuber |
Soundboard |
| GB 585870 |
Feb. 12, 1947 |
P. H. Bilhuber |
High Frequency Molding |
| 2453185 |
Nov. 9, 1948 | P. H. Bilhuber |
Apparatus for Edge Gluing Strip Elements |
| 2529862 |
Nov. 14, 1950 |
P. H. Bilhuber |
Sounboard |
| Can 489670 |
Jan. 13, 1953 |
P. H. Bilhuber |
Sounboard |
| Des 174477 |
Apr. 12, 1955 |
Teague & Jerabek |
Grand Piano |
| 2911874 |
Nov. 10, 1959 | Walter Gunther |
Touch Regulator |
| 1064325 |
Feb. 4, 1960 |
Walter Gunther |
Touch Regulator |
| 3091149 |
May 25, 1963 |
Frank Walsh |
Wrestplank (Hexagrip) |
| 3240095 |
Mar. 15, 1966 | Theo. D. Steinway |
Permafree Action |
| 3942403 |
Mar. 9, 1976 |
Jos. J. Pramberger |
Bushing for Piano Action |
| 4386455 |
June 7, 1983 |
Walter Drasche |
Permafree Bushing Cloth |
