Patents per Year
Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308927 | Well drilling tool | — | 1982-01-05 |
| 4284149 | Well drilling tool | — | 1981-08-18 |
| 4260032 | Well drilling tool | — | 1981-04-07 |
| 4260167 | Well drilling tool | — | 1981-04-07 |
| 4260030 | Well tool | — | 1981-04-07 |
| 4256189 | Well drilling tool | Martin L. Tomek | 1981-03-17 |
| 4214166 | Magnetic lens system for corpuscular radiation equipment | Isolde Dietrich, Erwin Knapek, Karl Nachtrieb, Reinhard Weyl, Helmut Zerbst +1 more | 1980-07-22 |
| 4209701 | Magnetic lens arrangement for corpuscular radiation equipment working under a vacuum | Isolde Dietrich, Erwin Knapek, Karl Nachtrieb, Reinhard Weyl, Helmut Zerbst +1 more | 1980-06-24 |
| RE30257 | Well drilling tool | — | 1980-04-22 |