Assignee
TONE COMMANDER SYSTEMS INC
6 granted patents·59 citations·filing 1976–1979
Technology mixH04M5
Top patents by PatentIndex Score
6 records- 0174US4188511AMulti-link telephone intercom systemTONE COMMANDER SYSTEMS INC·Filed 1978·Granted Feb 12, 1980·17 cites·20 claims
- 0269US4258232ALine hold circuitsTONE COMMANDER SYSTEMS INC·Filed 1979·Granted Mar 24, 1981·14 cites·18 claims
- 0363US4086441AMessage-waiting and do-not-disturb communications systemTONE COMMANDER SYSTEMS INC·Filed 1977·Granted Apr 25, 1978·12 cites·26 claims
- 0451US4158110ATone selective key telephone intercom system including digital tone detectorTONE COMMANDER SYSTEMS INC·Filed 1977·Granted Jun 12, 1979·8 cites·24 claims
- 0547US4086444ADial pulse key telephone intercom systemTONE COMMANDER SYSTEMS INC·Filed 1976·Granted Apr 25, 1978·6 cites·10 claims
- 0637USD245871STelephone communications moduleTONE COMMANDER SYSTEMS INC·Filed 1976·Granted Sep 20, 1977·2 cites·1 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →