Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5206486 | Data recorder and stylus therefor | Richard J. Stephens | 1993-04-27 |
| 4488034 | Data registering apparatus | Richard J. Stephens | 1984-12-11 |
| 4485298 | Perforating stylus | Richard J. Stephens | 1984-11-27 |
| 4425796 | Hermetically sealed tank gauge apparatus | Jack L. Hubbard | 1984-01-17 |