Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D280143 | Electric vacuum cleaner | Robert C. Berfield | 1985-08-13 |
| D276948 | Dolly for a tank, barrel, or the like | Rudolph W. Wacek, Robert C. Berfield | 1984-12-25 |
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D280143 | Electric vacuum cleaner | Robert C. Berfield | 1985-08-13 |
| D276948 | Dolly for a tank, barrel, or the like | Rudolph W. Wacek, Robert C. Berfield | 1984-12-25 |