Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888531 | Variable drive mechanism for the panel of a gate or similar structure | — | 1989-12-19 |
| 4878529 | Sectional overhead door for low lintel heights | — | 1989-11-07 |
| 4876868 | Method for forming an object of metal by cold pressing | Hans-Joachim Tushaus | 1989-10-31 |
| 4844746 | Method of producing a tantalum stock material of high ductility | Otto Bach | 1989-07-04 |
| 4819495 | Gear for converting a rotary into a translational motion | — | 1989-04-11 |
| 4794972 | Door leaf member | — | 1989-01-03 |