Issued Patents All Time
Showing 101–111 of 111 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370195 | Drill bit inserts enhanced with polycrystalline diamond | Monte Russell, Dah-Ben Liang | 1994-12-06 |
| 5305840 | Rock bit with cobalt alloy cemented tungsten carbide inserts | Dah-Ben Liang | 1994-04-26 |
| 5158148 | Diamond-containing cemented metal carbide | — | 1992-10-27 |
| 5152194 | Hardfaced mill tooth rotary cone rock bit | Scott D. McDonough, Robert H. Slaughter, Jr. | 1992-10-06 |
| 5051112 | Hard facing | Proserfina C. Rey | 1991-09-24 |
| 5045092 | Diamond-containing cemented metal carbide | — | 1991-09-03 |
| 4972912 | Diamond insert | — | 1990-11-27 |
| 4944774 | Hard facing for milled tooth rock bits | Lance D. Underwood, Naresh J. Kar, Thomas W. Oldham, Cary A. Roth, Brian J. Armstrong | 1990-07-31 |
| 4836307 | Hard facing for milled tooth rock bits | Lance D. Underwood, Naresh J. Kar, Thomas W. Oldham, Cary A. Roth, Brian J. Armstrong | 1989-06-06 |
| 4588606 | Abrasion resistant coating and method for producing the same | Merle H. Weatherly | 1986-05-13 |
| 4526618 | Abrasion resistant coating composition | Merle H. Weatherly | 1985-07-02 |