Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7171851 | Temperature compensated strain measurement | — | 2007-02-06 |
| 7099235 | Geophone and method of manufacturing a geophone | — | 2006-08-29 |
| 5044460 | Downhole seismic exploration device and apparatus | Shitomi Katayama, Francis Mons, Robert Crispin Porter | 1991-09-03 |
| 4953136 | Downhole seismic exploration device and apparatus | Shitomi Katayama, Francis Mons, Robert Crispin Porter | 1990-08-28 |
| 4675289 | Method of measuring the number of eumycete cells | Hideo Kanou, Shigeru Yamanaka | 1987-06-23 |