Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4488006 | Apparatus for controlling the application of telephone line power in a telephone set | Donald D. Huizinga, Donald R. Means | 1984-12-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4488006 | Apparatus for controlling the application of telephone line power in a telephone set | Donald D. Huizinga, Donald R. Means | 1984-12-11 |