Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D340251 | Microscope | Friedrich K. Frenkler | 1993-10-12 |
| D340252 | Microscope | Friedrich K. Frenkler | 1993-10-12 |
| D321364 | Computer output printer | Masayoshi Eto, Hiroshi Hidaka, Friedrich K. Frenkler | 1991-11-05 |