Patent Explorer

Browse, filter, and analyze 5 patents across global jurisdictions.

Patent Number	Title	Assignee	Status	Filing Date	Grant Date	Expires	Claims	Actions
US4202218A	Bridge circuit	International Telephone and Telegraph Corp	Expired / Lapsed	1978-06-28	1980-05-13	1998-06-28	21	Inspect PDF
US4037783A	Reduced outside air capability for unit ventilators	International Telephone and Telegraph Corp	Expired / Lapsed	1976-02-19	1977-07-26	1996-02-19	31	Inspect PDF
US4015115A	Picture phone	International Telephone and Telegraph Corp	Expired / Lapsed	1975-12-09	1977-03-29	1995-12-09	44	Inspect PDF
US3989942A	Retro-reflecting laser responser and data modulator	International Telephone and Telegraph Corp	Expired / Lapsed	1974-12-13	1976-11-02	1994-12-13	6	Inspect PDF
US3981440A	Digital signal detector	International Telephone and Telegraph Corp	Expired / Lapsed	1974-09-25	1976-09-21	1994-09-25	7	Inspect PDF