ALVEN CAPITAL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5144260 Method and apparatus for perturbation cancellation of a phase locked oscillatorExpiredSep 25, 91Sep 01, 92[H03L]
5142554 Data separator with noise-tolerant adaptive thresholdExpiredOct 31, 90Aug 25, 92[H04L]
5128928 Digital radio telephone systemExpiredOct 31, 90Jul 07, 92[H04Q, H04J]
5109545 Proximal cable-less communication system with intentional signal pathExpiredFeb 09, 90Apr 28, 92[H04B]
5101505 Method and apparatus for selective sideband signal correction in a proximal cable-less communication systemExpiredFeb 09, 90Mar 31, 92[H04B]
5091941 Secure voice data transmission systemExpiredOct 31, 90Feb 25, 92[H04L]
D321185 Cordless handset telephone or similar articleExpiredAug 17, 90Oct 29, 91[]
5032802 Hybrid directional coupler circuitExpiredFeb 09, 90Jul 16, 91[H01P]
4759078 Coordinated local oscillator receiving systemExpiredNov 14, 86Jul 19, 88[H04B]

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