Position Orientation Systems, Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4823170 Line of sight measuring systemExpiredFeb 22, 85Apr 18, 89[G01B]
4653102 Directional microphone systemExpiredNov 05, 85Mar 24, 87[H04M, H04B]
4642786 Method and apparatus for position and orientation measurement using a magnetic field and retransmissionExpiredMay 25, 84Feb 10, 87[G06F, G01S, G01B]
4622644 Magnetic position and orientation measurement systemExpiredMay 10, 84Nov 11, 86[G01B]
4618822 Displacement sensing device utilizing adjustable tuned circuitExpiredApr 18, 84Oct 21, 86[G01B]
4576481 Passive optical position measurement systemExpiredDec 13, 82Mar 18, 86[G01B]
4506354 Ultrasonic position detecting systemExpiredSep 30, 82Mar 19, 85[G01S]

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