Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767329 | T-attachment for the detachable fastening of dental prostheses | Harry Schiwiora, Alfred Schart | 1988-08-30 |
| 4632659 | Precision attachment for securing dental prostheses | Harry Schiwiora | 1986-12-30 |