Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7669639 | Molding and die casting apparatus and methods | Gregg E. Whealy, Ryan A. Haas, Brian Backus | 2010-03-02 |
| 5080813 | Lubricant composition containing dialkyldithiophosphoric acid neutralized with alkoxylated aliphatic amines | Karl P. Kammann, Jr. | 1992-01-14 |
| 4662461 | Fixed-contact stabilizer | — | 1987-05-05 |
| 4615401 | Automatic hydraulic thruster | — | 1986-10-07 |
| 4561508 | Roller-reamer | — | 1985-12-31 |
| 4542797 | Roller reamer | — | 1985-09-24 |
| 4522234 | Multiple conduit drill pipe | Jackson M. Kellner | 1985-06-11 |
| 4499924 | Method of making a drill pipe wear sleeve assembly and product thereof | — | 1985-02-19 |
| 4480703 | Drilling head | — | 1984-11-06 |
| 4478244 | Mud saver valve | — | 1984-10-23 |
| 4458404 | Method of making sleeved drill pipe | — | 1984-07-10 |
| 4449897 | Single-acting piston pump having two heads | — | 1984-05-22 |
| 4436118 | Sleeved drill pipe | — | 1984-03-13 |
| 4434863 | Drill string splined resilient tubular telescopic joint for balanced load drilling of deep holes | — | 1984-03-06 |
| 4416476 | Intermediate weight drill stem member | — | 1983-11-22 |
| 4396234 | Weldable blade stabilizer | — | 1983-08-02 |
| 4393155 | Enhanced viscosity maintenance and demulsibility in asphalt emulsions | — | 1983-07-12 |
| 4378852 | Wedge lock stabilizer | — | 1983-04-05 |
| 4304310 | Drilling head | — | 1981-12-08 |
| 4285406 | Drilling head | David E. Young | 1981-08-25 |
| 4281726 | Drill string splined resilient tubular telescopic joint for balanced load drilling of deep holes | — | 1981-08-04 |
| 4281724 | Drilling head | — | 1981-08-04 |
| 4261426 | Reamer stabilizer | — | 1981-04-14 |
| 4217966 | Junk basket, bit and reamer stabilizer | — | 1980-08-19 |
| 4189012 | Earth boring tool | — | 1980-02-19 |