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For the Inventor, By the Inventor

Troy, MI, United States of America

Keith V Leigh-Monstevens

This inventor holds 77 USPTO granted patents, primarily in Hydraulic Control Systems (CPC class 192 ). Top assignees: Automotive Products, Inc., Automotive Products (USA), Inc., Ap Aero, Inc. Active years: 1984-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keith V Leigh-Monstevens. Retrieved from https://idiyas.com/inventor/keith-v-leigh-monstevens

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

USPTO Granted Patents = 77

% Patents Active = 98.7

Average Co-Inventor Count = 1.8

ph-index = 19

Forward Citations = 1,057(Granted Patents)

Forward Citations (Not Self Cited) = 989(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Troy, MI (US) (1984 - 1992)
  • Rochester Hills, MI (US) (1991 - 2009)

Company Filing History:

goldMedal57 out of 295 
 
Automotive Products, Inc.
 patents
silverMedal10 out of 29 
 
Automotive Products (USA), Inc.
 patents
bronzeMedal1 out of 1 
 
Ap Aero, Inc
 patent
4. 1 out of 64 
 
Fte Automotive Gmbh
 patents
5. 1 out of 2 
 
Tale-Gator Distributors, LLC
 patents
6. 7 out of 834,513 
Other
 patents

Years Active: 1984-2009

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Areas of Expertise:
Hydraulic Clutch Actuator
Electric Clutch Actuator
Modular Hydraulic Control
Diaphragm Assembly
Master Cylinder
Transmission Logic
Motor Vehicle Control
Quick Connect Coupling
Pushrod Isolator
Tandem Master Cylinder
Seating Accessory
Throttle Control
77 patents (USPTO):Explore Patents
1. 7513557 - Seating and protector accessory (2009-04-07),
2. 7222486 - Diaphragm assembly (2007-05-29),
3. 7001561 - Right angle tube connector (2006-02-21),
4. 6789388 - Triple action damper for hydraulic clutch actuator (2004-09-14),
5. 6389956 - Concentrically mounted hydraulic clutch slave cylinder (2002-05-21),
6. 6374724 - Concentrically mounted hydraulic clutch slave cylinder (2002-04-23),
7. 6095306 - Pushrod impact isolator (2000-08-01),
8. 5716081 - Spring clip for quick connect coupling (1998-02-10),
9. 5267635 - Clutch actuator system (1993-12-07),
10. 5113657 - Modular hydraulic control apparatus (1992-05-19),
11. 5094079 - Master cylinder assembly (1992-03-10),
12. 5083433 - Prefilled hydraulic actuator apparatus with separate reservoir and (1992-01-28),
13. 5070983 - Damper for hydraulic clutch actuator (1991-12-10),
14. 5065135 - Transmission logic controlling starter motor and backup light (1991-11-12),
15. 5042133 - Testing method for electric shift control apparatus (1991-08-27),

Title: **Keith V Leigh-Monstevens: A Prolific Inventor from Troy, MI**

Introduction

Keith V Leigh-Monstevens, based in Troy, Michigan, is a distinguished inventor known for his impressive portfolio of 77 patents. His innovative works span various fields, contributing significantly to the automotive industry and beyond. With a focus on practical and functional designs, Keith has developed notable inventions that enhance the usability and efficiency of various systems.

Latest Patents

Among his latest inventions is the **Seating and Protector Accessory**, designed specifically for the interior surface and upper edge of a pickup truck tailgate. This accessory features a unitary member made of plastic sheet material, which includes a generally planar base portion that comfortably accommodates a human posterior and a lip portion that protects the tailgate's upper edge surface. Additionally, a backrest is pivotally movable, providing support when in use and stowing neatly when not needed.

Another of his significant inventions is the **Diaphragm Assembly** for use with hydraulic apparatuses. This assembly consists of a rigid cap and a tubular diaphragm made from elastomeric material. The design incorporates an annular collar and a main body with radially extending arms to allow for large expansions and contractions, while also ensuring structural integrity with the addition of the cap's rigid arms.

Career Highlights

Throughout his career, Keith has contributed to several reputable companies, including Automotive Products, Inc. and Automotive Products (USA), Inc. His work in these organizations has been pivotal, allowing him to translate innovative ideas into tangible products that meet market needs.

Collaborations

Keith has collaborated with talented individuals in the industry, including coworkers Richard A. Nix and Brian D. Mabee. Together, they have fostered a creative environment that encourages the development of groundbreaking inventions and improved designs.

Conclusion

Keith V Leigh-Monstevens exemplifies the spirit of innovation with his remarkable contributions to the field of inventions. His latest patents showcase not only his creativity and technical skills but also his dedication to improving everyday products. As he continues to develop and patent new technologies, his impact on the industry is expected to grow, inspiring future inventors and designers alike.

Profile summary based on public USPTO records.
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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