| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 03/09/1976 | US3943300 Telephone users apparatus |
| 03/09/1976 | US3943292 Automatic telephone answering apparatus |
| 03/09/1976 | US3943291 Automatic telephone answering apparatus |
| 03/09/1976 | US3943289 Automatic telephone caller |
| 03/09/1976 | US3943288 Telephone incorporating binary coded decimal time display |
| 03/02/1976 | US3941951 Telephone stand |
| 03/02/1976 | US3941942 Two of eight tone encoder |
| 03/02/1976 | US3941941 Relayless switching circuit for application of ringing signals |
| 03/02/1976 | US3941934 Telephone answering system |
| 02/24/1976 | US3940573 Manually actuable repertory dialer |
| 02/24/1976 | US3939678 Telephone locking apparatus |
| 02/17/1976 | US3939318 Electrical push-button switch |
| 02/17/1976 | US3939311 Muting circuit for subscribers telephone |
| 02/17/1976 | US3939310 Stereophonic headset with ear to ear acoustical passageway |
| 02/10/1976 | US3937906 Telephone hook switch comprising separately operable contact groups |
| 02/10/1976 | US3937900 Long distance telephone call limiting device |
| 02/10/1976 | US3937893 Automatic telephone answering device |
| 01/27/1976 | US3935390 Telephone answering and message recording apparatus |
| 01/27/1976 | US3935389 Method and apparatus for automatically limiting rewind in a telephone answering machine |
| 01/20/1976 | US3933233 Control circuit for subscriber station in video telephone system |
| 01/13/1976 | US3932709 Electronic business telephone |
| 01/13/1976 | US3932707 Electric impulse transmitters for telephone instruments |
| 01/06/1976 | US3931470 Tape marking and indicating device for remote control operation |