Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5603502 | Poker tournament method | — | 1997-02-18 |
| 5167453 | Temperature data recorder | Robert M. Nakagawa | 1992-12-01 |
| 4755063 | Temperature compensated data recorder | Robert M. Nakagawa | 1988-07-05 |
| 4253617 | Speed governor for a disposable data recorder | Robert M. Nakagawa | 1981-03-03 |