He; Dexin
Patent Applications and Registrations
Patent applications and USPTO patent grants for He; Dexin.The latest application filed is for "rotary digging and compression enlarging driller and boring method".
- He; Dexin - Beijing CN
| Patent | Date |
|---|---|
| Rotary digging and compression enlarging driller and boring method Grant 7,938,198 - He May 10, 2 | 2011-05-10 |
| Rotary Digging And Compression Enlarging Driller And Boring Method App 20100300757 - He; Dexin | 2010-12-02 |
| Downhole reamer with double acting dual piston cylinder Grant 6,217,260 - He April 17, 2 | 2001-04-17 |
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