| Patents for H01H 63 - Details of electrically-operated selector switches (104) | |
|---|---|
| 09/1976 | |
| 09/28/1976 | US3983331 Switch having a matrix of relays |
| 04/1976 | |
| 04/27/1976 | US3953813 Electromagnetic switch matrix device |
| 02/1976 | |
| 02/03/1976 | US3936612 Control and holding circuit for relay matrices |
| 01/1976 | |
| 01/06/1976 | US3931481 Plural line selector apparatus for enabling selection of one of a plurality of telephone lines |
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