Patent Explorer
Browse, filter, and analyze 2794 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| GB551209A | Rectifying contact detector systems for very short electric waves | AT&T Inc | Expired / Lapsed | 1941-02-04 | — | 1961-02-04 | 0.0 yrs | 0 | |
| EP0510859A2 | Molded optical package utilizing leadframe technology | AT&T Inc | Expired / Lapsed | 1992-04-14 | — | 2012-04-14 | 0.0 yrs | 11 | |
| WO1980001336A1 | A demultiplexing photodetector | AT&T Inc | Expired / Lapsed | 1979-12-04 | — | 1999-12-04 | 0.0 yrs | 0 | |
| EP0413489A2 | Optical assembly comprising optical fiber coupling means | AT&T Inc | Expired / Lapsed | 1990-08-06 | — | 2010-08-06 | 0.0 yrs | 11 | |
| GB466063A | High frequency electromagnetic wave transmission apparatus | AT&T Inc | Expired / Lapsed | 1936-05-08 | — | 1956-05-08 | 0.0 yrs | 0 | |
| GB684079A | Improvements in or relating to magnetic recorders, particularly for storing signals in telephone systems | AT&T Inc | Expired / Lapsed | 1951-08-24 | — | 1971-08-24 | 0.0 yrs | 0 | |
| GB625501A | Electrical resistive elements and methods of making them | AT&T Inc | Expired / Lapsed | 1947-08-01 | — | 1967-08-01 | 0.0 yrs | 0 | |
| DE1941336A1 | Speech signal processing device | AT&T Inc | Expired / Lapsed | 1969-08-14 | — | 1989-08-14 | 0.0 yrs | 0 | |
| GB2060309A | Technique for estimation of displacement and/or velocity of objects in video scenes | AT&T Inc | Expired / Lapsed | 1980-02-25 | — | 2000-02-25 | 0.0 yrs | 0 | |
| EP0479478B1 | Communications network arranged to transport connection oriented and connectionless messages | AT&T Inc | Expired / Lapsed | 1991-09-25 | 2001-05-09 | 2011-09-25 | 0.0 yrs | 4 | |
| US6215859B1 | Delivery of urgent messages by integrated forced delivery and voice mailbox | AT&T Inc | Expired / Lapsed | 1997-10-02 | 2001-04-10 | 2017-10-02 | 0.0 yrs | 18 | |
| US4731663A | Method and apparatus for color identification | AT&T Inc | Expired / Lapsed | 1987-05-20 | 1988-03-15 | 2007-05-20 | 0.0 yrs | 14 | |
| US4653048A | Method for interprocessor message accountability | AT&T Inc | Expired / Lapsed | 1984-05-14 | 1987-03-24 | 2004-05-14 | 0.0 yrs | 16 | |
| US4541980A | Methods of producing plastic-coated metallic members | AT&T Inc | Expired / Lapsed | 1984-01-09 | 1985-09-17 | 2004-01-09 | 0.0 yrs | 22 | |
| US4537663A | Method of and apparatus for plating using controlled progressive immersion | AT&T Inc | Expired / Lapsed | 1982-07-27 | 1985-08-27 | 2002-07-27 | 0.0 yrs | 13 | |
| US4415901A | Low power beam switchable antenna arrangement | AT&T Inc | Expired / Lapsed | 1981-09-21 | 1983-11-15 | 2001-09-21 | 0.0 yrs | 3 | |
| US4412123A | Laminated electric heat generating member for reflow soldering devices | AT&T Inc | Expired / Lapsed | 1980-05-09 | 1983-10-25 | 2000-05-09 | 0.0 yrs | 7 | |
| US4399555A | Cellular high capacity mobile radiotelephone system with fleet-calling arrangement for dispatch service | AT&T Inc | Expired / Lapsed | 1980-04-28 | 1983-08-16 | 2000-04-28 | 0.0 yrs | 15 | |
| US4383332A | High capacity digital mobile radio system | AT&T Inc | Expired / Lapsed | 1980-11-21 | 1983-05-10 | 2000-11-21 | 0.0 yrs | 20 | |
| US4379003A | Magnetic devices by selective reduction of oxides | AT&T Inc | Expired / Lapsed | 1980-07-30 | 1983-04-05 | 2000-07-30 | 0.0 yrs | 9 |
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