Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE48455 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2021-03-02 |
| RE47369 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2019-04-30 |
| 9353578 | Hardfacing compositions, methods of applying the hardfacing compositions, and tools using such hardfacing compositions | Sike Xia | 2016-05-31 |
| 9230592 | Electronic system with a method of motor spindle bandwidth estimation and calibration thereof | Jie Wan, Shuyu Cao, Jianghong Ding, Jern Khang Tan | 2016-01-05 |
| 9212523 | Drill bit having geometrically sharp inserts | Weiqi Yin, Bradley Head | 2015-12-15 |
| 9033070 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2015-05-19 |
| 8839887 | Composite sintered carbides | Sike Xia | 2014-09-23 |
| 8800691 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2014-08-12 |
| 8413746 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2013-04-09 |
| 8091655 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2012-01-10 |
| 8020638 | Seal with dynamic sealing surface at the outside diameter | Sudarsanam Chellappa | 2011-09-20 |
| 7798257 | Shaped cutter surface | Yuelin Shen, Youhe Zhang | 2010-09-21 |
| 7757789 | Drill bit and insert having bladed interface between substrate and coating | Jiaqing Yu, Chris Tucker | 2010-07-20 |
| 7703559 | Rolling cutter | Yuelin Shen, Youhe Zhang, Jiaqing Yu, Madapusi K. Keshavan | 2010-04-27 |
| 7682557 | Multiple processes of high pressures and temperatures for sintered bodies | Sike Xia, Sharath K. Kolachalam | 2010-03-23 |
| 7665547 | Drill bit reservoir with controllable relief pressure | George Witman, Carlos A. Torres | 2010-02-23 |
| 7461708 | Elastomeric seal assembly having auxiliary annular seal components | Sudarsanam Chellappa | 2008-12-09 |
| 7347290 | Multi-part energizer for mechanical seal assembly | Jiaqing Yu | 2008-03-25 |
| 7331410 | Drill bit arcuate-shaped inserts with cutting edges and method of manufacture | Jim Minikus, Armardeep Singh, Quan Nguyen, Sharath K. Kolachalam | 2008-02-19 |
| 7188691 | Metal seal with impact-absorbing ring | Jiaqing Yu | 2007-03-13 |
| 7117961 | Dynamic seal with soft interface | Dean Peter deRimanoczy | 2006-10-10 |
| 7040424 | Drill bit and cutter having insert clusters and method of manufacture | Peter Davies, Hubert W. Penka, Jr., Ernest L. Buford | 2006-05-09 |
| 6929079 | Drill bit cutter element having multiple cusps | Scott D. McDonough, Vincent Shotton | 2005-08-16 |
| 6823951 | Arcuate-shaped inserts for drill bits | Jim Minikus, Amardeep Singh | 2004-11-30 |
| 6696137 | Woven and packed composite constructions | — | 2004-02-24 |