Patent Explorer
Browse, filter, and analyze 5 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US4723316A | Polarization independent coherent optical heterodyne receivers | Nokia Bell Labs | Expired / Lapsed | 1986-05-08 | 1988-02-02 | 2006-05-08 | 0.0 yrs | 6 | |
| US4622672A | Self-stabilized semiconductor lasers | Nokia Bell Labs | Expired / Lapsed | 1984-01-20 | 1986-11-11 | 2004-01-20 | 0.0 yrs | 13 | |
| US4608697A | Spectral control arrangement for coupled cavity laser | Nokia Bell Labs | Expired / Lapsed | 1983-06-16 | 1986-08-26 | 2003-06-16 | 0.0 yrs | 40 | |
| US4545043A | Announcement system message playback arrangement | Nokia Bell Labs | Expired / Lapsed | 1982-05-21 | 1985-10-01 | 2002-05-21 | 0.0 yrs | 16 | |
| US4539554A | Analog integrated circuit pressure sensor | Nokia Bell Labs | Expired / Lapsed | 1982-10-18 | 1985-09-03 | 2002-10-18 | 0.0 yrs | 6 |