Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5879860 | Method of writing a pattern by an electron beam | Grahame Craig Rosolen | 1999-03-09 |
| 5155983 | Distance measurement and control using coded sonic signals | Ronald T. Sheehan, Charles G. Bagg | 1992-10-20 |
| 4302826 | Resonant acoustic transducer system for a well drilling string | William H. Kent | 1981-11-24 |
| 4275546 | Stone discriminator | Carl E. Bohman | 1981-06-30 |