Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860373 | Location dependent signal processor | Mac L. Hartless | 1989-08-22 |
| 4854391 | Hand propelled soil cultivation tool | — | 1989-08-08 |
| 4804632 | Method for detecting combustible gases and device therefor | Hansjochen Schuck, Peter J. Iredale | 1989-02-14 |