Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4534418 | Spring teeth | Fritz Hegemann | 1985-08-13 |
| 4377280 | Cylindrical helical compression spring | Josef Wienand | 1983-03-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4534418 | Spring teeth | Fritz Hegemann | 1985-08-13 |
| 4377280 | Cylindrical helical compression spring | Josef Wienand | 1983-03-22 |