Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852938 | Transparent roof convertible automobile with retractable sunshade | Gerald P. Hirshberg, Stephen D. Ball | 1989-08-01 |
| 4801174 | Transparent roof convertible automobile | Gerald P. Hirshberg, Stephen D. Ball | 1989-01-31 |