Assignee
TEL TONE CORP
9 granted patents·28 citations·filing 1974–1977
Top patents by PatentIndex Score
9 records- 0145US4121880AElongate electrical connector retaining deviceTEL TONE CORP·Filed 1977·Granted Oct 24, 1978·14 cites·33 claims
- 0240US3946163APort multiplexer for telephone signal processing systemsTEL TONE CORP·Filed 1975·Granted Mar 23, 1976·3 cites·14 claims
- 0330US3988687AStep-servoed tone detectorTEL TONE CORP·Filed 1975·Granted Oct 26, 1976·1 cites·14 claims
- 0427US3959598AIdentification forwarding circuit for use with tone-to-pulse convertersTEL TONE CORP·Filed 1974·Granted May 25, 1976·3 cites·16 claims
- 0526US4165912AOffset adapter connectorTEL TONE CORP·Filed 1977·Granted Aug 28, 1979·5 cites·6 claims
- 0625US3961141AStop time-out until after first DTMF digit dialed circuitTEL TONE CORP·Filed 1974·Granted Jun 1, 1976·1 cites·8 claims
- 0723US4146751ASolid state pulsing apparatus for pulsing selected line relay terminalsTEL TONE CORP·Filed 1977·Granted Mar 27, 1979·0 cites·9 claims
- 0823US4009352AMultiple link circuit for a port multiplexerTEL TONE CORP·Filed 1976·Granted Feb 22, 1977·0 cites·17 claims
- 0915US4145576ADTMF and rotary dial signal receiverTEL TONE CORP·Filed 1977·Granted Mar 20, 1979·1 cites·45 claims
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