Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9605485 | Percussion drilling assembly and hammer bit with gage and outer row reinforcement | Shantanu N. Swadi, Angelo Spedale, Charles H. Dewey | 2017-03-28 |
| 8763729 | Percussion drilling assembly and hammer bit with gage and outer row reinforcement | Shantanu N. Swadi, Angelo Spedale, Charles H. Dewey | 2014-07-01 |
| 8657040 | Percussion drilling assembly and locking system therefor | Shantanu N. Swadi, James A. Simson | 2014-02-25 |
| 8387725 | Percussion drilling assembly and hammer bit with gage and outer row reinforcement | Shantanu N. Swadi, Angelo Spedale, Charles H. Dewey | 2013-03-05 |
| 8312613 | Percussion drilling assembly with annular locking member | — | 2012-11-20 |
| 8312944 | Percussion hammer bit with a driver sub including a guide sleeve portion | Shantanu N. Swadi, Michael S. Krauel | 2012-11-20 |
| 8061450 | Percussion drilling assembly having erosion retarding casing | — | 2011-11-22 |
| 7997346 | Percussion drilling assembly with annular locking member | — | 2011-08-16 |
| 7428938 | Percussion bit drill drive collar with retention mechanism and method of assembling | — | 2008-09-30 |