Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881897 | Tooth-root implant with long-term resistance to repetitive stresses | Henning Franek, Heinz Broemer, Volker Strunz, Wolfgang Rosenkranz | 1989-11-21 |
| 4830655 | High temperature-resistant material for devices used for forming glass optical elements with high surface quality | Henning Franek, Heinz Broemer | 1989-05-16 |