Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5260996 | Current limited electronic ringing generator | Gerald W. Beene | 1993-11-09 |
| 5146476 | High gain amplifier for reception of low level pulse code modulation nonreturn-to-zero signals | Joseph Whitehead | 1992-09-08 |
| 5050210 | Metallic current limiter | Joseph Whitehead | 1991-09-17 |
| 4903292 | System for transmitting low frequency tones through a digital loop carrier system | — | 1990-02-20 |
| 4767980 | Inductance multiplier circuit | William Chen, Glenn Yancey | 1988-08-30 |
| 4554504 | Negative resistance compensated transformer | — | 1985-11-19 |