Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4406496 | Backrest for chairs | Fritz Drabert | 1983-09-27 |
| 4362335 | Adjustable chair backrest mechanism using pneumatic and mechanical springs | Fritz Drabert | 1982-12-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4406496 | Backrest for chairs | Fritz Drabert | 1983-09-27 |
| 4362335 | Adjustable chair backrest mechanism using pneumatic and mechanical springs | Fritz Drabert | 1982-12-07 |