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For the Inventor, By the Inventor

Houston, TX, United States of America

Stewart & Stevenson LLC


USPTO Granted Patents = 28



Trademarks = 5

Forward Citations = 74

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31 inventors (with patents filed for the assignee):

goldMedal Brian Sharp (10 out of 10 patents)

silverMedal Chris Harvell (8 out of 8 patents)

bronzeMedal Paul L Smith (5 out of 29 patents)

4.  Mark Scott Payne (5 out of 177 patents)

5.  Chad Joost (4 out of 4 patents)

6.  Haomin Lin (3 out of 4 patents)

7.  Tom Robertson (3 out of 4 patents)

8.  Stephen M Saffioti (2 out of 2 patents)

9.  Rodney Earl Lancaster (2 out of 2 patents)

10.  Jeff D Smith (2 out of 55 patents)

11.  Filiberto Garcia (2 out of 2 patents)

12.  Adam Lambertus (2 out of 2 patents)

13.  Jeff Rother (2 out of 2 patents)

14.  Eric Evezic (2 out of 2 patents)

15.  Doseo Park (1 out of 2 patents)


Core Competencies:
Mechanical Lubricating Oil
Speed Control System
Air Intake Heater
Generator Cooling
Fracturing Pumps
Well Servicing Pump
Integrated Fracking System
Adaptive Power Management
Electrical Motors
Oilfield Gels
Injector Head
Coiled Tubing Systems

28 patents:

1. 12692977 - Mechanical lubricating oil system with kidney loop system (2026-07-28),
2. 12637971 - Air intake heater treatment and ventilation (2026-05-26),
3. 12637123 - Speed and traction control system for rail vehicles (2026-05-26),
4. 12483095 - Generator cooling and enclosure ventilation system (2025-11-25),
5. 12424801 - Software controlled interlocking pilot pin connector system (2025-09-23),
6. 12392446 - Adjustable blender pump mount for hydraulic fracturing (2025-08-19),
7. 12381440 - Directed air ventilation for lowering temperature in enclosed generators (2025-08-05),
8. 12116024 - Platform lift for railroad car moving vehicle (2024-10-15),
9. 12060859 - Generator enclosure air intake with damper (2024-08-13),
10. 12018728 - Generator mounting skid with isolators and auxiliary support system (2024-06-25),
11. 12000251 - Fracturing pumps (2024-06-04),
12. 11767748 - Well fracturing systems with electrical motors and methods of use (2023-09-26),
13. 11753916 - Integrated fracking system (2023-09-12),
14. 11719230 - Well servicing pump with electric motor (2023-08-08),
15. 11713633 - Dry product additive unit (2023-08-01),
Company Overview
Stewart & Stevenson LLC, based in Houston, Texas, specializes in the design and manufacturing of equipment and systems for various industries, including oil and gas, military, and commercial sectors. The company is known for its innovative solutions in power generation, fluid handling, and vehicle systems, contributing to enhanced operational efficiency and reliability. With a strong focus on engineering excellence, Stewart & Stevenson continues to support its clients with advanced technologies tailored to meet specific industry needs.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Stewart & Stevenson LLC USPTO Patent Assignee Logo
28 Patents

#192 in Houston, TX

#675 in Texas

#12,016 in US

#23,299 in the World

Houston, TX (US)
Houston, TX, United States of America

Stewart & Stevenson LLC

Forward Citations = 74

31 inventors:

goldMedal Brian Sharp (10 out of 10 patents)

silverMedal Chris Harvell (8 out of 8 patents)

bronzeMedal Paul L Smith (5 out of 29 patents)

4.  Mark Scott Payne (5 out of 177 patents)

5.  Chad Joost (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Stewart & Stevenson LLC. Retrieved from https://idiyas.com/company/stewart-and-stevenson

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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