D. H. Baldwin Company
28Patents
0Active
28Granted
30Portfolio score
Filing activity: Apr 27, 1971 → Sep 19, 1977
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3959565A | Tin oxide coating | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4010557A | Music laboratory | Physics | 17 | Expired |
| US3971672A | Light diffuser for photovoltaic cell | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4055038A | Apparatus for wrapping strings for musical instruments | Physics | 13 | Expired |
| US4154131A | Digital arpeggio system | Emerging Cross-Sectional Technologies | 11 | Expired |
| US3971283A | Electronic Zimbelstern | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4127051A | Piano key frame | Physics | 9 | Expired |
| US4119008A | Means for improving the repetition characteristics of an upright piano action | Physics | 9 | Expired |
| US4176575A | Improved touch operated capacitance switch circuit for an electronic organ | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4170916A | Touch operated capacitive switch for electronic musical instruments | Physics | 9 | Expired |
| US4122744A | Variable frequency generator for polyphonic electronic music system | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4156379A | Digital arpeggio system | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4006658A | Organ capture action | Physics | 7 | Expired |
| US3940635A | Self-damping circuit | Physics | 6 | Expired |
| US4056995A | Single master tone generator | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4031795A | Tone signal modulation system | Physics | 5 | Expired |
| USRE29144E | Automatic chord and rhythm system for electronic organ | General | 4 | Expired |
| US4058042A | Key transposing electronic organ | Physics | 4 | Expired |
| US4019418A | Organ stop tablet mechanism | Physics | 4 | Expired |
| US4056996A | Electronic music system | Emerging Cross-Sectional Technologies | 3 | Expired |
| USD254676S | Organ console | General | 2 | Expired |
| US3999149A | Modulation system | Physics | 2 | Expired |
| USD254673S | Organ console | General | 1 | Expired |
| US4137809A | Arpeggio system for electronic organs | Emerging Cross-Sectional Technologies | 1 | Expired |
| USD254137S | Organ console | General | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.