Patents Acquired from 1975 to Present
- 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 | ||
| Feb 18, 1975 |
550,343 |
Joseph J. Pramberger |
"Bushing for Piano Action"; elastomeric resin
bushing for piano action |
Mar 09, 1976 |
3,942,403 |
| Jun 15, 1981 | 274,015 | Walter D. Drasche | "Bearings for Piano Action Mechanism Employing Bushing Cloth and Method of Fabricating Same"; bearings for piano action mechanism employing "permafree" bushing cloth and method of fabricating same | Jun 07, 1983 | 4,386,455 |
| Jul 18, 1988 | 201,112 | Wendell K. Castle | "Grand Pianos"; design for the Steinway grand piano serial no. 500,000 | Jul 09, 1991 | Des. 318,059 |
| May 18, 1989 Jul 11, 1989 Feb 19, 1991 |
353,924 378,047 657,882 |
James M. Lombino | "Piano Forte Hammer and Method of Making Same"; a method for forming a piano hammer in which the felt is impregnated with an acrylic copolymer | Jun 30, 1992 | 5,125,310 |
| May 18, 1990 | 525,468 | Salvadore J. Calabrese Henry A. Scarton S. Frank Murray Christopher M. Ettles Warren C. Kennedy Saim Dinc Bessem Jlidi William Strong |
"Piano Key Covers Formed of Ivory Substitute and Pianos having Same" | Feb 02, 1993 | 5,183,955 |
| May 18, 1990 May 07, 1991 Aug 14, 1992 |
525,468 696,600 930,487 |
Salvadore J. Calabrese Henry A. Scarton S. Frank Murray Christopher M. Ettles Warren C. Kennedy Saim Dinc Bessem Jlidi William Strong |
"Key Covers Formed of Ivory Substitute and Pianos Having Same" | Nov 30, 1993 | 5,265,515 |
| May 18, 1990 May 07, 1991 Aug 14, 1992 Sep 08, 1993 Dec 22, 1994 |
525,468 696,600 930,487 118,042 361,715 |
Salvadore J. Calabrese Henry A. Scarton S. Frank Murray Christopher M. Ettles Warren C. Kennedy Saim Dinc Bessem Jlidi William Strong |
"Member With Synthetic Surface Replicating a Surface of a Specimen of a Natural Material" | Apr 23, 1996 | 5,509,344 |
| Nov 17, 1994 | 341,521 | Marvin S. Jones Dirk Dickten Gary M. Green Paul Oleksy Gregory R. Sims Ludwig Tomescu Robert C. Berger |
"Piano Escapement Action" | Apr 30, 1996 | 5,511,454 |
| Sep 19, 1997 | 08531138 | William S. Youse | "Piano Key Leveling"; means for adjusting height of keys | Aug 5, 1997 | 5,654,515 |