Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4965705 | Electronic badge having double-effect pins | — | 1990-10-23 |
| 4884062 | Alarming wallet actuated by a pickpocket's fingers | Sheng-Chuan Chen | 1989-11-28 |
| 4794378 | Gravitationally-actuating missing reminder for pocket article | Sheng-Chuan Chen | 1988-12-27 |
| 4721948 | Wallet with missing-card reminder | — | 1988-01-26 |
| 4688097 | D.C.-coupled video clamping circuit | — | 1987-08-18 |