For the Inventor, By the Inventor

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Morristown, TN, United States of America

Tuff Torq Corporation

USPTO Granted Patents = 17

% Expired Patents = 35.3

Forward Citations = 269

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16 inventors (with patents filed for the assignee):

Robert Abend (13 out of 64 patents)

Travis S McCloud (5 out of 8 patents)

Kerwyn Stoll (5 out of 6 patents)

4. Keith Johnson Andrews (4 out of 12 patents)

5. Norihiro Ishii (3 out of 115 patents)

6. Ryota Ohashi (3 out of 135 patents)

7. Toshiyuki Hasegawa (3 out of 47 patents)

8. Koji Irikura (2 out of 60 patents)

9. Hiroaki Shimizu (2 out of 53 patents)

10. Masaru Iida (1 out of 42 patents)

11. Hirohiko Kawada (1 out of 22 patents)

12. Katsumoto Mizukawa (1 out of 15 patents)

13. Donald Wieber (1 out of 8 patents)

14. Hideaki Okada (1 out of 79 patents)

15. Koji Irikura (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. 7360613 - Transmission for speed changing and steering of a vehicle (2008-04-22),

2. 7340891 - Axle driving system (2008-03-11),

3. 7331176 - Transaxle (2008-02-19),

4. 6874593 - Driving apparatus for speed changing and steering of a vehicle (2005-04-05),

5. 6755264 - Riding lawn mower (2004-06-29),

6. 6651770 - Driving apparatus for speed changing and steering of a vehicle (2003-11-25),

7. 6648094 - Driving apparatus for speed changing and steering of a vehicle (2003-11-18),

8. 6629577 - Driving apparatus for speed changing and steering of a vehicle (2003-10-07),

9. 6591936 - Driving apparatus for speed changing and steering of a vehicle (2003-07-15),

10. 6540633 - Transmission for speed changing and steering of a vehicle (2003-04-01),

11. 6536212 - Operation mechanism of a variable displacement hydraulic pump (2003-03-25),

12. 6125630 - Axle driving apparatus (2000-10-03),

13. 6098740 - Axle driving unit for a lawn tractor (2000-08-08),

14. 6044941 - Clutch-brake interlocking mechanism for starting and stopping vehicle (2000-04-04),

15. 5850758 - Transmission for self-propelled walking lawn mowers (1998-12-22),

Company Overview

Tuff Torq Corporation, based in Morristown, Tennessee, specializes in the design and manufacturing of high-performance hydraulic drive systems and components. The company primarily serves the lawn and garden equipment industry, providing innovative solutions that enhance the efficiency and reliability of outdoor power equipment. With a focus on engineering excellence, Tuff Torq is committed to advancing technology in hydraulic systems, ensuring optimal performance for a wide range of applications in the outdoor equipment sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

17 Patents

#4 in Morristown, TN

#190 in Tennessee

#18,894 in US

#35,918 in the World

Morristown, TN, United States of America

Tuff Torq Corporation

Forward Citations = 269

16 inventors:

Robert Abend (13 out of 64 patents)

Travis S McCloud (5 out of 8 patents)

Kerwyn Stoll (5 out of 6 patents)

4. Keith Johnson Andrews (4 out of 12 patents)

5. Norihiro Ishii (3 out of 115 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tuff Torq Corporation. Retrieved from https://idiyas.com/company/tuff-torq

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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