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Leyland, United Kingdom

Torotrak (Development) Limited

USPTO Granted Patents = 76

% Expired Patents = 6.6

Forward Citations = 1,853

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35 inventors (with patents filed for the assignee):

Christopher John Greenwood (28 out of 41 patents)

Thomas G Fellows (14 out of 14 patents)

Brian Joseph Dutson (11 out of 18 patents)

4. Stephen William Murray (8 out of 14 patents)

5. John William Edward Fuller (7 out of 23 patents)

6. Philip Duncan Winter (6 out of 6 patents)

7. Leslie Kendrick Robinson (5 out of 6 patents)

8. Robert Andrew Oliver (5 out of 5 patents)

9. Matthew Piers Burke (4 out of 4 patents)

10. Matthew Gibson Field (4 out of 4 patents)

11. Andrew Damian De Freitas (3 out of 5 patents)

12. Richard Ruebusch (2 out of 7 patents)

13. Adrian Lee (2 out of 2 patents)

14. Ian David Cornwell (2 out of 10 patents)

15. Mervyn John Patterson (2 out of 2 patents)

Core Competencies:

Powertrain Control

Hydraulic Control Circuit

Infinitely Variable Transmission

Variator

Driveline

Toroidal Transmission

Electronic Controller

Cooling Fluid Supply

Ratio Limiting Arrangement

Transmission Assembly

Energy Recovery System

76 patents: Sort by Forward Citations

1. 9850998 - Powered metal variator components (2017-12-26),

2. 9568083 - Infinitely-variable transmission for a vehicle (2017-02-14),

3. 9341264 - Toroidal continuously variable transmission (2016-05-17),

4. 9175758 - Transmission of the toroidal race rolling traction type (2015-11-03),

5. 9102223 - Energy recovery system for a vehicle driveline (2015-08-11),

6. 9079574 - Method for controlling a motor vehicle powertrain (2015-07-14),

7. 9051999 - Continuously variable transmission (2015-06-09),

8. 8989970 - Continuously variable ratio transmission assembly and method of control of same (2015-03-24),

9. 8950562 - Continuously variable transmission with brake (2015-02-10),

10. 8924111 - Electronic controller for a continuously variable transmission and a method of control of a continuously variable transmission (2014-12-30),

11. 8892315 - Method of controlling a continuously variable transmission (2014-11-18),

12. 8882626 - Continuously variable ratio transmission (2014-11-11),

13. 8771133 - Drive mechanism for infinitely variable transmission (2014-07-08),

14. 8764605 - Variator (2014-07-01),

15. 8734290 - Control system for a vehicle drivetrain (2014-05-27),

Torotrak (Development) Limited is a leading global engineering company specializing in the development and commercialization of advanced transmission and driveline technology. With a focus on improving fuel efficiency and reducing emissions, Torotrak delivers innovative solutions for various industries including automotive, off-highway, and motorsport. Through their expertise in mechanical energy recovery systems, torque transfer solutions, and traction drive technology, Torotrak continually pushes the boundaries of efficiency and performance in powertrain systems.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

76 Patents

#1 in Leyland

#245 in United Kingdom

#9,873 in the World

Leyland, United Kingdom

Torotrak (Development) Limited

Forward Citations = 1,853

35 inventors:

Christopher John Greenwood (28 out of 41 patents)

Thomas G Fellows (14 out of 14 patents)

Brian Joseph Dutson (11 out of 18 patents)

4. Stephen William Murray (8 out of 14 patents)

5. John William Edward Fuller (7 out of 23 patents)

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