Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4907260 | Telephone line communications control system | John R. Prohs, Charles G. Akins, Phillip E. Sandilands, Michael R. Scheid | 1990-03-06 |
| 4837799 | Telephone line communications control system | John R. Prohs, Charles G. Akins, Phillip E. Sandilands, Michael R. Scheid | 1989-06-06 |