Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651050 | Ground-to-air telephone calling system and related method for establishing a telephone link between a ground-based caller and a passenger on board an aircraft | William D. Hays, Ernest A. Oswalt | 1997-07-22 |
| 5634198 | Nationwide communication system | Dennis W. Cameron, Walter C. Roehr, Jr., Masood Garahi, William D. Hays, David W. Ackerman | 1997-05-27 |