Ts'ao; Si-Ling
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ts'ao; Si-Ling.The latest application filed is for "device for automatically opening and closing a door".
- Ts'ao; Si-Ling - Taipei TW
| Patent | Date |
|---|---|
| Device for automatically opening and closing a door Grant 4,924,626 - Ts'ao May 15, 1 | 1990-05-15 |
| System for control of water temperature Grant 4,421,269 - Ts'ao December 20, 1 | 1983-12-20 |
| Telephone index for repertory dialer Grant 4,275,273 - Ts'Ao June 23, 1 | 1981-06-23 |
| Telephone repertory dialer Grant 3,988,550 - Ts'ao October 26, 1 | 1976-10-26 |
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