Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305027 | Extension attachment for a telephone earpiece | Erling C. Hesla | 1989-12-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305027 | Extension attachment for a telephone earpiece | Erling C. Hesla | 1989-12-12 |