Westland plc
🏢 View company profile →27Patents
0Active
27Granted
32Portfolio score
Filing activity: Jul 1, 1980 → Dec 10, 1987
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| 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.