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Your search returned 132 patents.
( 370/434 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 4621358 | Remote switch for telephony switching system
| December 10, 1984 |
| 4607363 | Buffer device for a voice transmission network
| May 20, 1985 |
| 4594704 | Spare subscriber terminal device in a digital concentrator
| November 16, 1984 |
| 1 2 |
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