Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5912620 | Combined type intrusion and attack sensing means | Chao-Ting Lin | 1999-06-15 |
| 5909169 | Electric bell having a mechanism for supporting electromagnetic unit | — | 1999-06-01 |
| 5668527 | Doorbell base | — | 1997-09-16 |
| 5659286 | Doorbell base | — | 1997-08-19 |