Ferranti plc
70Patents
0Active
70Granted
39Portfolio score
Filing activity: Aug 20, 1980 → Apr 29, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4701745A | Data compression system | Electricity | 216 | Expired |
| US4601206A | Accelerometer system | Physics | 176 | Expired |
| US4722601A | Apparatus for determining the direction of a line of sight | Physics | 60 | Expired |
| US4686615A | Power supply circuit | Electricity | 58 | Expired |
| US4680012A | Projected imaged weapon training apparatus | Mechanical Engineering; Lighting; Heating | 51 | Expired |
| US4714873A | Microwave noise measuring apparatus | Physics | 50 | Expired |
| US4619616A | Weapon aim-training apparatus | Mechanical Engineering; Lighting; Heating | 48 | Expired |
| US4691446A | Three-dimensional position measuring apparatus | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4618858A | Information display system having a multiple cell raster scan display | Physics | 38 | Expired |
| US4450585A | Signal switching and combining systems for diversity radio receiving systems | Electricity | 32 | Expired |
| US4481448A | Automatic electrical motor speed control | Electricity | 32 | Expired |
| US4768028A | Display control apparatus having a cursor | Physics | 27 | Expired |
| US4611491A | Accelerometer system | Physics | 24 | Expired |
| US4823271A | Data processing arrangements | Physics | 24 | Expired |
| US4484290A | Line disturbance monitor | Physics | 24 | Expired |
| US4500207A | Non-dispersive optical determination of gas concentration | Physics | 22 | Expired |
| US4587594A | Electrical circuit assemblies | Electricity | 17 | Expired |
| US4571663A | Electrical circuit assemblies | Electricity | 17 | Expired |
| US4694229A | Servo positioning system | Physics | 15 | Expired |
| US4554448A | Optical elements | Physics | 15 | Expired |
| US4612720A | Large scale display | Physics | 15 | Expired |
| US4458982A | Optical scanning system including a rotatable drum with mirrors and including a rotatable optical shutter | Physics | 14 | Expired |
| US4641038A | Imaging device | Electricity | 14 | Expired |
| US4578603A | Temperature-independent gain control circuit | Electricity | 13 | Expired |
| US4643539A | Sightline stablisation apparatus | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.