Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5848376 | GPS receiver powered by interface signals | Glenn C. Steiner | 1998-12-08 |
| 5589835 | Differential GPS receiver system linked by infrared signals | David R. Gildea | 1996-12-31 |
| 5528248 | Personal digital location assistant including a memory cartridge, a GPS smart antenna and a personal computing device | Glenn C. Steiner, Matthew M. Trask | 1996-06-18 |