the Post Office
Records under this name other than patents the Post Office holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 6,227,378 | Sorting system for groups of items having recirculation Formerly held Lapsed on the fee record Ended May 8, 2009 · From the USPTO record | Lapsed on the fee record | Ended May 8, 2009 | From the USPTO record |
| US 3,930,714 | Method of manufacturing an optical fibre light waveguide Term ended Term ended no later than Jan 6, 1996 · Low confidence | Term ended | Term ended no later than Jan 6, 1996 | Low confidence |
| US 3,936,777 | Arrangements for simulating inductance and filter networks incorporating such improvements Term ended Term ended no later than Feb 3, 1996 · Low confidence | Term ended | Term ended no later than Feb 3, 1996 | Low confidence |
| US 3,938,050 | Non-linear correction of waveforms Term ended Term ended no later than Feb 10, 1996 · Low confidence | Term ended | Term ended no later than Feb 10, 1996 | Low confidence |
| US 3,944,811 | Dielectric waveguides Term ended Term ended no later than Mar 16, 1996 · Low confidence | Term ended | Term ended no later than Mar 16, 1996 | Low confidence |
| US 3,957,342 | Sodium borosilicate glasses for dielectric optical waveguides Term ended Term ended no later than May 18, 1996 · Low confidence | Term ended | Term ended no later than May 18, 1996 | Low confidence |
| US 3,957,343 | Optical communications systems Term ended Term ended no later than May 18, 1996 · Low confidence | Term ended | Term ended no later than May 18, 1996 | Low confidence |
| US 3,958,861 | Dielectric optical waveguides Term ended Term ended no later than May 25, 1996 · Low confidence | Term ended | Term ended no later than May 25, 1996 | Low confidence |
| US 3,961,989 | Method of making IMPATT diode and resulting diode Term ended Term ended no later than Jun 8, 1996 · Low confidence | Term ended | Term ended no later than Jun 8, 1996 | Low confidence |
| US 3,970,795 | Measurement of noise in a communication channel Term ended Term ended no later than Jul 20, 1996 · Low confidence | Term ended | Term ended no later than Jul 20, 1996 | Low confidence |