Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5190374 | Method and apparatus for continuously mixing well treatment fluids | Weldon M. Harms, Lewis R. Norman, Syed Hamid | 1993-03-02 |
| 5174320 | Bulk cement metering device | — | 1992-12-29 |
| 5114239 | Mixing apparatus and method | — | 1992-05-19 |
| 5103908 | Method for cementing a well | — | 1992-04-14 |
| 5046855 | Mixing apparatus | Kevin D. Edgley | 1991-09-10 |
| 5029645 | Cement mixing with vibrator | — | 1991-07-09 |
| 4979829 | Cement mixing with vibrator | — | 1990-12-25 |
| 4956141 | Molding process utilizing a mold release membrane | James E. Matzinger, William R. Weaver | 1990-09-11 |
| 4890938 | Wooden drawer guide | Matt C. Scalf, John G. Lampe | 1990-01-02 |
| 4751910 | Flue gas/combustion air heat exchanger | Patrick B. Sowada | 1988-06-21 |
| 4429188 | Telephone call screener | — | 1984-01-31 |