Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D260096 | Microfilm reader | John W. Overman, John R. Zellner | 1981-08-04 |
| 4217039 | Microfiche viewer with rotatable base | John R. Zellner, Eino M. Lehto | 1980-08-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D260096 | Microfilm reader | John W. Overman, John R. Zellner | 1981-08-04 |
| 4217039 | Microfiche viewer with rotatable base | John R. Zellner, Eino M. Lehto | 1980-08-12 |