Liao; Hsieh Yuan
Patent Applications and Registrations
Patent applications and USPTO patent grants for Liao; Hsieh Yuan.The latest application filed is for "connecting shaft structure of electric screwdriver".
- Liao; Hsieh Yuan - Taipei N/A TW
- Liao; Hsieh-Yuan - Nei Hu Dist. Taipei TW
- Liao; Hsieh-Yuan - Nan-Kang Dist. Taipei TW
| Patent | Date |
|---|---|
| Switch structure of electric screwdriver Grant 11,331,775 - Liao May 17, 2 | 2022-05-17 |
| Connecting shaft structure of electric screwdriver Grant 11,110,572 - Liao September 7, 2 | 2021-09-07 |
| Connecting Shaft Structure Of Electric Screwdriver App 20200338703 - LIAO; HSIEH YUAN | 2020-10-29 |
| Switch Structure Of Electric Screwdriver App 20200338698 - LIAO; HSIEH YUAN | 2020-10-29 |
| Electric screwdriver Grant 4,878,404 - Liao November 7, 1 | 1989-11-07 |
| Structural improvement of electric screwdriver with respect to the torsion adjustment thereof Grant 4,653,359 - Liao March 31, 1 | 1987-03-31 |
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