For the Inventor, By the Inventor

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Kentwood, MI, United States of America

Diesel Technology Company

Calculating rank

USPTO Granted Patents = 26

% Expired Patents = 3.8

EPO Patents = 3

Forward Citations = 216

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36 inventors (with patents filed for the assignee):

Robert D Straub (9 out of 39 patents)

Richard F Teerman (4 out of 16 patents)

Gregg R Spoolstra (4 out of 9 patents)

4. Robert C Timmer (4 out of 7 patents)

5. Michael VanAllsburg (3 out of 3 patents)

6. Beckie J DeYoung (3 out of 3 patents)

7. Kenneth R Potter (3 out of 3 patents)

8. Donna Mosher (2 out of 2 patents)

9. Randall Clare Harkema (2 out of 6 patents)

10. Philip James Czarnecki (2 out of 2 patents)

11. Bryan Thomas Jett (2 out of 2 patents)

12. Werner Faupel (2 out of 2 patents)

13. Stacy Jean Shorey (2 out of 2 patents)

14. Werner Pape (1 out of 6 patents)

15. Thomas Edwin Earhart (1 out of 4 patents)

Core Competencies:

Fuel Injection Pump

Fuel Injector Nozzle

Control Valve

High Pressure

Electromechanical Actuation

Common Rail

Valve Seat Refurbishing

Fuel Pump Control

Vapor-Prevention Accumulator

Solenoid Stator Assembly

Adjustable Eccentric Coupling

Internal Combustion Engine

26 patents: Sort by Forward Citations

1. 6598579 - Fuel injection pump for an internal combustion engine (2003-07-29),

2. 6543706 - Fuel injection nozzle for an internal combustion engine (2003-04-08),

3. 6513371 - Method for determining fuel injection rate shaping current in an engine fuel injection system (2003-02-04),

4. 6450778 - Pump system with high pressure restriction (2002-09-17),

5. 6339877 - Method and apparatus for refurbishing a valve seat in a fuel injector assembly (2002-01-22),

6. 6276610 - Control valve (2001-08-21),

7. 6238190 - Fuel injection pump and snubber valve assembly (2001-05-29),

8. 6158419 - Control valve assembly for pumps and injectors (2000-12-12),

9. 6116209 - Method of utilization of valve bounce in a solenoid valve controlled (2000-09-12),

10. 6089470 - Control valve assembly for pumps and injectors (2000-07-18),

11. 6059545 - Fuel pump control valve assembly (2000-05-09),

12. 6036460 - Flexible armature for fuel injection system control valve (2000-03-14),

13. 6019091 - Control valve (2000-02-01),

14. 6009858 - Fuel injector pump having a vapor-prevention accumulator (2000-01-04),

15. 5967707 - Short-hole drill bit (1999-10-19),

Company Overview

Diesel Technology Company, based in Kentwood, MI, specializes in the development and manufacturing of advanced diesel engine components and systems. The company focuses on enhancing engine performance, efficiency, and emissions control, catering to a diverse range of industries including automotive, marine, and industrial applications. With a commitment to innovation, Diesel Technology Company leverages cutting-edge research in engine technology to deliver solutions that meet the evolving demands of the market.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

26 Patents

#1 in Kentwood, MI

#469 in Michigan

#12,875 in US

#24,848 in the World

Kentwood, MI, United States of America

Diesel Technology Company

Forward Citations = 216

36 inventors:

Robert D Straub (9 out of 39 patents)

Richard F Teerman (4 out of 16 patents)

Gregg R Spoolstra (4 out of 9 patents)

4. Robert C Timmer (4 out of 7 patents)

5. Michael VanAllsburg (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Diesel Technology Company. Retrieved from https://idiyas.com/company/diesel-technology-company

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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