Patent assignee · GB · COMPANY

Westland plc

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27Patents
0Active
27Granted
32Portfolio score

Filing activity: Jul 1, 1980 → Dec 10, 1987

Most-cited patents

PatentTitleAreaCited byStatus
US4819182A Method and apparatus for reducing vibration of a helicopter fuselage Performing Operations; Transporting 118 Expired
US4783023A Helicopter rotor speed changing transmission Emerging Cross-Sectional Technologies 69 Expired
US4875962A Method for laying a sheet of material on a surface Performing Operations; Transporting 28 Expired
US4479619A Helicopter transmission systems Emerging Cross-Sectional Technologies 26 Expired
US4525010A Aircraft seat Performing Operations; Transporting 26 Expired
US4436483A Helicopter rotors Performing Operations; Transporting 18 Expired
US4531695A Composite helicopter fuselage Performing Operations; Transporting 17 Expired
US4615413A Recirculating lubricating system with monitor filter unit Mechanical Engineering; Lighting; Heating 16 Expired
US4455123A Connecting element and helicopter rotor incorporating same Performing Operations; Transporting 15 Expired
US4668169A Helicopter rotor blade Performing Operations; Transporting 15 Expired
US4774892A Article restraining means for pallets Performing Operations; Transporting 14 Expired
US4484491A Transmission systems Emerging Cross-Sectional Technologies 13 Expired
US4549850A Helicopter rotors Performing Operations; Transporting 13 Expired
US4466775A Helicopter rotors Performing Operations; Transporting 10 Expired
US4714409A Helicopter rotor Performing Operations; Transporting 10 Expired
US4507341A Carbon fibre structures Emerging Cross-Sectional Technologies 9 Expired
US4834318A Helicopter flight control systems Emerging Cross-Sectional Technologies 8 Expired
US5050477A Helicopter including missile transporting and launching apparatus Performing Operations; Transporting 8 Expired
US4447023A Apparatus for mounting a device above a helicopter rotor Performing Operations; Transporting 7 Expired
US4785710A Helicopter Performing Operations; Transporting 7 Expired
US4496284A Helicopter rotors Performing Operations; Transporting 4 Expired
US4805850A Helicopter rotor control systems Performing Operations; Transporting 3 Expired
US4776560A Fuel flow control valve Mechanical Engineering; Lighting; Heating 2 Expired
US4509898A Helicopter rotors Emerging Cross-Sectional Technologies 2 Expired
US4441384A Freewheel devices Emerging Cross-Sectional Technologies 2 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.