LIU; Zongwen
Patent Applications and Registrations
Patent applications and USPTO patent grants for LIU; Zongwen.The latest application filed is for "a hybrid bit with roller cone having inserts".
- LIU; Zongwen - Wuhan Hubei
- Liu; Zongwen - Ibaraki JP
- Liu, Zongwen - Tsukuba-shi JP
Trademarks
| Patent | Date |
|---|---|
| A Hybrid Bit With Roller Cone Having Inserts App 20200362638 - TU; Guanfu ; et al. | 2020-11-19 |
| Temperature measuring method using micro temperature sensing element Grant 7,331,709 - Bando , et al. February 19, 2 | 2008-02-19 |
| Temperature measuring method using micro temperature sensing element App 20050238082 - Bando, Yoshio ; et al. | 2005-10-27 |
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