Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D300093 | Combined telephone booth and advertising displays | Robert J. Cameron, William C. Ehlert | 1989-03-07 |
| 4635396 | Bus window release mechanism | David T. Ahlgren | 1987-01-13 |