Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H1072 | One-man gas particulate filter unit | John D. Estes, Keith J. Conklin | 1992-07-07 |
| 5114677 | Gas detection apparatus and related method | Michael F. Steele, George M. Dobson | 1992-05-19 |
| H677 | Motor control circuit | — | 1989-09-05 |