Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5527220 | Articulatable joint with multi-faceted ball and socket | — | 1996-06-18 |
| 5095310 | Method and apparatus for using synthesized analog data for testing read circuitry in a magnetic tape data storage subsystem | Brian G. Cleveland | 1992-03-10 |
| RE33751 | System and method for controlled directional drilling | Frank DeLucia | 1991-11-26 |
| 4732491 | Downhole motor bearing assembly | — | 1988-03-22 |
| 4720199 | Bearing structure for downhole motors | James McPherson, Robert G. Toth | 1988-01-19 |
| 4719076 | Tungsten carbide chips-matrix bearing | Robert G. Toth | 1988-01-12 |
| 4710036 | Bearing assembly | — | 1987-12-01 |
| 4667751 | System and method for controlled directional drilling | Frank DeLucia | 1987-05-26 |
| 4657090 | Tapered friction bearing assembly | — | 1987-04-14 |
| 4632193 | In-hole motor with bit clutch and circulation sub | — | 1986-12-30 |
| 4560014 | Thrust bearing assembly for a downhole drill motor | — | 1985-12-24 |
| 4511193 | Thrust and radial bearing assembly | — | 1985-04-16 |
| 4501521 | Locking fastener assembly | — | 1985-02-26 |
| 4329127 | Sealed bearing means for in hole motors | John E. Tschirky | 1982-05-11 |
| 4299296 | In-hole motor drill with bit clutch | — | 1981-11-10 |
| 4276944 | In-hole motor with bit clutch | — | 1981-07-07 |
| 4253532 | In-hole motor drill with locking bit clutch | — | 1981-03-03 |