| Patent No. | Patent Title: |
| 4748656 | Personal computer--as an interface between a telephone station se... |
| 4747127 | Customer programmable real-time system |
| 4742536 | Telephone monitor circuit and method |
| 4741021 | Facsimile device |
| 4741020 | Clerk paging system |
| 4737980 | Computer data entry method and apparatus |
| 4736406 | Expansion subsystem for use in a communication system |
| 4736411 | Telephone instrument |
| 4734931 | Integrated calling directory |
| 4731820 | Data transmission system of key telephone system |
| 4731816 | Ensemble modem structure for imperfect transmission media |
| 4731824 | Chime pulser for phone call backup interpreter |
| 4727575 | State control for a real-time system utilizing a nonprocedural la... |
| 4727571 | Circuit for surge voltage protection in electronic telephone stat... |
| 4723269 | Method and apparatus for power-up of unattended computer |
| 4720855 | Telephone apparatus |
| 4718082 | Modem for effecting full duplex asynchronous/synchronous digital ... |
| 4715059 | Conversational video phone |
| 4712232 | Multiple telephone jack slide assembly |
| 4707849 | High speed automatic test apparatus especially for electronic dir... |
| 4700379 | Aircraft communications apparatus |
| 4698841 | Methods of establishing and terminating connections in a dis... |
| 4691340 | Image information accessing user terminal |
| 4691342 | Multi-speed, full duplex modem |
| 4691343 | Noise elimination system for pictures and the like |
| 4689814 | External device interface for an electronic telephone |
| 4686699 | Call progress monitor for a computer telephone interface |
| 4685123 | Communication system having voice and data capability |
| 4682349 | Switching system with video switching matrix |
| 4679226 | Computer security guard circuit |
| 4677659 | Telephonic data access and transmission system |
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