Tsai; Cheng-Chang
Patent Applications and Registrations
Patent applications and USPTO patent grants for Tsai; Cheng-Chang.The latest application filed is for "plumbing pliers".
- Tsai; Cheng-Chang - Taiping City TW
- Tsai; Cheng-Chang - Taoyuan TW
- Tsai; Cheng-Chang - Taoyuan City TW
- Tsai; Cheng-Chang - Taiping TW
- Tsai; Cheng-Chang - Taichung City TW
- Tsai; Cheng-Chang - Taoyuan Hsien TW
- Tsai; Cheng-Chang - Taichung TW
- Tsai; Cheng Chang - Taichung 41166 TW
- Tsai; Cheng-Chang - Taipei TW
| Patent | Date |
|---|---|
| Plumbing Pliers App 20220152786 - Tsai; Cheng-Chang | 2022-05-19 |
| Method of social key recovery and related device Grant 11,212,093 - Chiu , et al. December 28, 2 | 2021-12-28 |
| Method of Social Key Recovery and Related Device App 20200092097 - Chiu; Hsien-Chun ; et al. | 2020-03-19 |
| Torsion wrench Grant D833,841 - Tsai November 20, 2 | 2018-11-20 |
| Cutter App 20160023361 - Tsai; Cheng-Chang | 2016-01-28 |
| Transformer App 20150028980 - Lin; Yu-Chin ; et al. | 2015-01-29 |
| Transformer App 20140085030 - Lin; Yu-Chin ; et al. | 2014-03-27 |
| Well coated wrench Grant 8,347,759 - Tsai January 8, 2 | 2013-01-08 |
| Insulated Ratchet Wrench App 20120174716 - Tsai; Cheng-Chang | 2012-07-12 |
| Well Coated Wrench App 20110314973 - Tsai; Cheng-Chang | 2011-12-29 |
| Quick release mechanism for socket wrench Grant 7,584,686 - Tsai September 8, 2 | 2009-09-08 |
| Quick release mechanism for socket wrench App 20090133538 - Tsai; Cheng Chang | 2009-05-28 |
| Self-adjusting plier device Grant 7,255,027 - Tsai August 14, 2 | 2007-08-14 |
| Portable electric air pump Grant 6,155,781 - Tsai December 5, 2 | 2000-12-05 |
| Pump Grant D420,011 - Tsai February 1, 2 | 2000-02-01 |
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