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Patent Explorer

Browse, filter, and analyze 15 patents across global jurisdictions.

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Patent Number Title Assignee Status Filing Date Grant Date Expires Remaining Claims Actions
US4202218A Bridge circuit International Telephone and Telegraph Corp Expired / Lapsed 1978-06-28 1980-05-13 1998-06-28 0.0 yrs 21
US4185886A Fiber optic connector International Telephone and Telegraph Corp Expired / Lapsed 1978-10-26 1980-01-29 1998-10-26 0.0 yrs 13
US4179695A System for identification of aircraft on airport surface pathways International Telephone and Telegraph Corp Expired / Lapsed 1978-10-02 1979-12-18 1998-10-02 0.0 yrs 11
US4164628A Processor for multiple, continuous, spread spectrum signals International Telephone and Telegraph Corp Expired / Lapsed 1978-03-17 1979-08-14 1998-03-17 0.0 yrs 5
US4156554A Coaxial cable assembly International Telephone and Telegraph Corp Expired / Lapsed 1978-04-07 1979-05-29 1998-04-07 0.0 yrs 7
US4138597A PCM time slot exchange International Telephone and Telegraph Corp Expired / Lapsed 1977-09-06 1979-02-06 1997-09-06 0.0 yrs 28
US4042925A Pseudo-random code (PRC) surveilance radar International Telephone and Telegraph Corp Expired / Lapsed 1975-11-24 1977-08-16 1995-11-24 0.0 yrs 17
US4037783A Reduced outside air capability for unit ventilators International Telephone and Telegraph Corp Expired / Lapsed 1976-02-19 1977-07-26 1996-02-19 0.0 yrs 31
US4015115A Picture phone International Telephone and Telegraph Corp Expired / Lapsed 1975-12-09 1977-03-29 1995-12-09 0.0 yrs 44
US3997898A Channeling method and apparatus International Telephone and Telegraph Corp Expired / Lapsed 1975-05-05 1976-12-14 1995-05-05 0.0 yrs 12
US3992939A Apparatus for producing a mass flow rate signal with or without a density signal International Telephone and Telegraph Corp Expired / Lapsed 1976-02-11 1976-11-23 1996-02-11 0.0 yrs 14
US3989942A Retro-reflecting laser responser and data modulator International Telephone and Telegraph Corp Expired / Lapsed 1974-12-13 1976-11-02 1994-12-13 0.0 yrs 6
US3981440A Digital signal detector International Telephone and Telegraph Corp Expired / Lapsed 1974-09-25 1976-09-21 1994-09-25 0.0 yrs 7
US3978849A Pulse rate indicator International Telephone and Telegraph Corp Expired / Lapsed 1975-04-17 1976-09-07 1995-04-17 0.0 yrs 6
US2856539A Apparatus and method for detecting overheated journal boxes International Telephone and Telegraph Corp Expired / Lapsed 1954-01-25 1958-10-14 1974-01-25 0.0 yrs 0