Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12031384 | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements | Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan +4 more | 2024-07-09 |
| 11215012 | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements | Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan +4 more | 2022-01-04 |
| 10774594 | Rotating cutting structures and structures for retaining the same | Youhe Zhang, Yuri Burhan | 2020-09-15 |
| 10774596 | Rolling cutter stability | Youhe Zhang, Yuri Burhan, Balasubramanian Durairajan, Sandeep Tammineni | 2020-09-15 |
| D874873 | Knife handle | — | 2020-02-11 |
| 10350770 | Pattern knife assembly | — | 2019-07-16 |
| 10287825 | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements | Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan +4 more | 2019-05-14 |
| 10267096 | Drill bit rolling element with retaining ring | Yuri Burhan, Jibin Shi, Youhe Zhang | 2019-04-23 |
| 10119341 | Cutter with support liner | Youhe Zhang, Yuri Burhan, Jibin Shi | 2018-11-06 |
| 9976356 | Rolling cutter with retaining ring | Yuri Burhan, Jibin Shi, Youhe Zhang | 2018-05-22 |
| 9869133 | Method of using spring loaded blocker to retain rolling cutters or mechanical lock cutters | Yuri Burhan, Jibin Shi | 2018-01-16 |
| 9605486 | Rolling cutter with close loop retaining ring | Yuri Burhan, Jibin Shi, Youhe Zhang | 2017-03-28 |
| 9464486 | Rolling cutter with bottom support | Youhe Zhang, Yuri Burhan, Jibin Shi | 2016-10-11 |
| 9464490 | Gage cutter protection for drilling bits | Youhe Zhang, Michael G. Azar, Yuri Burhan | 2016-10-11 |
| 9328564 | Cutting elements retained within sleeves | Youhe Zhang, Jibin Shi, Yuri Burhan | 2016-05-03 |
| D499301 | Knife holder | — | 2004-12-07 |
| D498394 | Knife hilt | — | 2004-11-16 |
| D497523 | Knife holder | — | 2004-10-26 |
| D494441 | Knife hilt | — | 2004-08-17 |
| D469666 | Knife handle | — | 2003-02-04 |
| D468972 | Knife hilt | — | 2003-01-21 |
| D445663 | Handle grip with ellipsoidal end | — | 2001-07-31 |