Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731729 | Electronic digital dual sequential timing control apparatus for environmental systems | Carlton J. Simmons, Jr. | 1988-03-15 |
| 4449437 | Automatic piano | Robert B. Cotton, Jr. | 1984-05-22 |
| 4442746 | Electronic organ having an improved tone generator system | Carlton J. Simmons, Jr. | 1984-04-17 |
| 4400668 | Period proportional two-phase voltage controlled oscillator | — | 1983-08-23 |
| 4389914 | Chord identification system for electronic musical instruments | Carlton J. Simmons, Jr. | 1983-06-28 |
| 4388850 | Multiple octave generator tuning system | — | 1983-06-21 |
| 4384505 | Chorus generator system | Robert B. Cotton, Jr., Russell L. Withington | 1983-05-24 |
| 4379422 | Polyphonic electronic music system | Walter Munch | 1983-04-12 |
| 4343219 | Delay line oscillator | — | 1982-08-10 |
| 4248123 | Electronic piano | David A. Bunger | 1981-02-03 |
| 4218950 | Active ladder filter for voicing electronic musical instruments | — | 1980-08-26 |