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Your search returned 61 patents.
( 368/13 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 4847818 | Wristwatch radiotelephone
| October 31, 1988 |
| 4480154 | Automatic telephone silencer
| May 16, 1983 |
| 4384171 | Automatic telephone silencer
| December 15, 1980 |
| 4145873 | Timing device for accumulating a telephone long distance call charge
| April 5, 1977 |
| 4119810 | Pushbutton telephone apparatus with automatic dialing and combinational sequential control signalling capabilities
| September 13, 1976 |
| 4115997 | Timing attachment for telephones
| April 15, 1977 |
| 4088839 | Telephone call timer
| October 14, 1975 |
| 4079201 | Electronic telephone call timer
| March 3, 1977 |
| 4075829 | Self-contained miniature timer
| June 11, 1976 |
| 4007347 | Simplified actuating switch for electronic timepieces
| July 28, 1975 |
| 3970793 | Telephone-call toll monitor and indicator
| October 25, 1974 |
| 3962548 | Direct readout exhibitor for determining long distance telephone charges
| May 8, 1974 |
| 3943288 | Telephone incorporating binary coded decimal time display
| October 23, 1973 |
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