Westland plc

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5050477 Helicopter including missile transporting and launching apparatusExpiredMar 19, 85Sep 24, 91[F41F, F41A]
4819182 Method and apparatus for reducing vibration of a helicopter fuselageExpiredFeb 04, 87Apr 04, 89[B04D, F16F]
4785710 HelicopterExpiredJul 21, 86Nov 22, 88[F41F]
4776560 Fuel flow control valveExpiredOct 20, 86Oct 11, 88[F16K]
4774892 Article restraining means for palletsExpiredApr 01, 87Oct 04, 88[B65D]
4714409 Helicopter rotorExpiredOct 02, 86Dec 22, 87[B64C]
4668169 Helicopter rotor bladeExpiredJun 19, 84May 26, 87[B64C]
4615413 Recirculating lubricating system with monitor filter unitExpiredApr 24, 84Oct 07, 86[F01B]
4549850 Helicopter rotorsExpiredJul 23, 84Oct 29, 85[B64C]
4531695 Composite helicopter fuselageExpiredJan 17, 84Jul 30, 85[B64C]
4525010 Aircraft seatExpiredJul 07, 83Jun 25, 85[B60R]
4509898 Helicopter rotorsExpiredJun 20, 83Apr 09, 85[B64C]
4507341 Carbon fibre structuresExpiredFeb 17, 84Mar 26, 85[H01R, H01Q]
4496284 Helicopter rotorsExpiredMar 18, 83Jan 29, 85[B64C]
4484491 Transmission systemsExpiredJun 15, 82Nov 27, 84[B64D, F16H, B64C]
4479619 Helicopter transmission systemsExpiredMar 29, 83Oct 30, 84[B64D, B64C]
4477224 Helicopter rotorExpiredSep 13, 82Oct 16, 84[B64C]
4473200 Stores handling apparatus and systemExpiredDec 10, 80Sep 25, 84[B64F]
4466775 Helicopter rotorsExpiredNov 09, 82Aug 21, 84[B64C]
4455123 Connecting element and helicopter rotor incorporating sameExpiredJun 01, 82Jun 19, 84[B64C]

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