Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4448365 | Film developing spool | Helmut Petsching, Walter Kremer, Rainer Bernhardt | 1984-05-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4448365 | Film developing spool | Helmut Petsching, Walter Kremer, Rainer Bernhardt | 1984-05-15 |