Yuan; Kuang Cheung
Patent Applications and Registrations
Patent applications and USPTO patent grants for Yuan; Kuang Cheung.The latest application filed is for "coaxial filter and pump".
- Yuan; Kuang Cheung - Longjiang CN
| Patent | Date |
|---|---|
| Childproof valve for swimming pool Grant 6,997,431 - Yuan February 14, 2 | 2006-02-14 |
| Water filter and pump Grant 6,991,721 - Yuan January 31, 2 | 2006-01-31 |
| Childproof valve for swimming pool App 20040173766 - Yuan, Kuang Cheung | 2004-09-09 |
| Coaxial filter and pump App 20040173518 - Yuan, Kuang Cheung | 2004-09-09 |
| Water filter and pump App 20040173517 - Yuan, Kuang Cheung | 2004-09-09 |
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