Patents Acquired from 1950 to 1974
- Patents Acquired from 1850 to 1874
- Patents Acquired from 1875 to 1899
- Patents Acquired from 1900 to 1924
- Patents Acquired from 1925 to 1949
- Patents Acquired from 1950 to 1974
- Patents Acquired from 1975 to Present
| Application | Inventor(s) | Title; Invention Claimed; Concordance |
Letters Patent | ||
| File Date | Number | Grant Date | Number | ||
| Aug 26, 1953 |
26,595 |
Walter Dorwin Teague Charles A. Jerabek |
"Grand Piano"; design for grand piano |
Apr 12, 1955 |
Des. 174,477 |
| Oct 17, 1956 | --- | Walter Günther | "Grand Piano Action With Means for Adjusting the Touch Weight Resistance of the Keys"; corresponds to 2,911,874 | Aug 27, 1959 | Ger. 1,064,325 |
| Oct 15, 1957 | 690,256 | Walter Günther | "Means for Adjusting the Touch of Keys in Pianos and Like Musical Instruments"; corresponds to Ger. 1,064,325 | Nov 10, 1959 | 2,911,874 |
| Nov 20, 1959 | 854,375 | Frank H. Walsh | "Wrestplanks"; hexagrip wrestplank (pin block) | May 28, 1963 | 3,091,149 |
| Mar 05, 1962 | 177,399 | Theodore D. Steinway | "Piano Action Bushing Assembly"; fluorocarbon resin ("permafree") bushing assembly for piano action | Mar 15, 1966 | 3,240,095 |