Assignee
LITTON BUSINESS TELEPHONE SYST
7 granted patents·50 citations·filing 1974–1976
Top patents by PatentIndex Score
7 records- 0175US4012602AToll restrictor for touch type digit selectorLITTON BUSINESS TELEPHONE SYST·Filed 1975·Granted Mar 15, 1977·19 cites·1 claims
- 0259US3931481APlural line selector apparatus for enabling selection of one of a plurality of telephone linesLITTON BUSINESS TELEPHONE SYST·Filed 1974·Granted Jan 6, 1976·11 cites·7 claims
- 0354US4000380AToll restrictor for touch type digit selectorLITTON BUSINESS TELEPHONE SYST·Filed 1975·Granted Dec 28, 1976·8 cites·1 claims
- 0448US4081615ASubset switching means in apparatus for a key telephone system for enabling intercom substations to access trunk linesLITTON BUSINESS TELEPHONE SYST·Filed 1976·Granted Mar 28, 1978·5 cites·4 claims
- 0538US4016372AApparatus for a key telephone system for enabling intercom substations to access trunk linesLITTON BUSINESS TELEPHONE SYST·Filed 1975·Granted Apr 5, 1977·3 cites·5 claims
- 0638US3982079ATouch-to-rotary converter for a telephone instrumentLITTON BUSINESS TELEPHONE SYST·Filed 1975·Granted Sep 21, 1976·4 cites·1 claims
- 0725US4064371AApparatus for a key telephone system for enabling intercom substations to access trunk linesLITTON BUSINESS TELEPHONE SYST·Filed 1976·Granted Dec 20, 1977·0 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when LITTON BUSINESS TELEPHONE SYST files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →