Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4573150 | Self-holding switch for use in a sound reproducing device | — | 1986-02-25 |
| 4547873 | Simplified sound reproducing device | — | 1985-10-15 |
| 4541085 | Simple acoustic playback device for a record having plurality of recording grooves | — | 1985-09-10 |
| 4524437 | Simplified sound-reproducing device having an external output shaft | — | 1985-06-18 |
| 4486871 | Continuous repeating type simplified sound reproducing device | — | 1984-12-04 |
| 4482990 | Simplified sound-reproducing device for a record disc having a plurality of recorded grooves | — | 1984-11-13 |
| 4447898 | Simplified sound reproducing device driven by a spring motor | — | 1984-05-08 |
| 4404667 | Sound reproducing device driven by a constant torque pull string type spring and started by selective starter rods for playing multiple record grooves | — | 1983-09-13 |
| 4252326 | Sound reproducing device | Katsumi Watanabe, Yutaka Shiseki | 1981-02-24 |
| 4195843 | Simplified motor assembly and related electrical connection in a _sound reproducing device | Katsumi Watanabe, Yutaka Shiseki | 1980-04-01 |