Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828161 | Method and device for manufacturing thin-walled hollow bodies of concentric metal layers | — | 1989-05-09 |
| 4807800 | Method for manufacturing thin-walled hollow bodies of concentric metal layers | — | 1989-02-28 |
| 4671448 | Method of preparing structural components having a symmetrically curved wall by buildup welding | Horst Zimmerman | 1987-06-09 |
| 4517434 | Method and apparatus for manufacturing a tube bend metal | Horst Zimmermann | 1985-05-14 |