logo

For the Inventor, By the Inventor

Tucson, AZ, United States of America

Walbro Engine Management, L.l.c.


USPTO Granted Patents = 92

% Expired Patents = 54.3


Trademarks = 2

Forward Citations = 675

Loading Chart...
Loading Chart...

85 inventors (with patents filed for the assignee):

goldMedal George M Pattullo (16 out of 39 patents)

silverMedal Ronald H Roche (13 out of 31 patents)

bronzeMedal John C Woody (10 out of 20 patents)

4.  Martin N Andersson (9 out of 31 patents)

5.  Kevin L Israelson (8 out of 19 patents)

6.  David L Speirs (7 out of 33 patents)

7.  Roger N Smith (7 out of 12 patents)

8.  Matthew A Braun (6 out of 12 patents)

9.  Kenneth J Cotton (6 out of 13 patents)

10.  Mark S Swanson (6 out of 22 patents)

11.  Michael P Burns (6 out of 11 patents)

12.  Jeffrey D Hanby (5 out of 12 patents)

13.  Eric G Zbytowski (5 out of 12 patents)

14.  Yoshiaki Douyama (5 out of 7 patents)

15.  Gary U Gliniecki (4 out of 8 patents)


Core Competencies:
Carburetor
Fuel Delivery
Ignition Control
Evaporative Emissions
Throttle Valve
Fuel Metering
Engine Startup
Position Sensor
Fuel Pump
Vapor Separator
Control Circuit
Auxiliary Fuel

92 patents:

1. 9279390 - Accelerator device for a carburetor (2016-03-08),
2. 9217403 - Level sensor mount (2015-12-22),
3. 9062630 - Carburetor fuel supply system (2015-06-23),
4. 9062629 - Carburetor fuel supply system (2015-06-23),
5. 9027910 - Fuel metering diaphragm with backing plate (2015-05-12),
6. 9022363 - Plugs for carburetors (2015-05-05),
7. 9022011 - Engine fuel delivery systems, apparatus and methods (2015-05-05),
8. 8939736 - Fuel pump assembly (2015-01-27),
9. 8933691 - Rotary position sensor (2015-01-13),
10. 8757121 - Supplying supplementary fuel for engine startup (2014-06-24),
11. 8622031 - System for supplementary fuel supply (2014-01-07),
12. 8453998 - Air scavenging carburetor (2013-06-04),
13. 8397702 - Control circuit for capacitor discharge ignition system (2013-03-19),
14. 8382072 - Charge forming device and solenoid valve (2013-02-26),
15. 8348244 - Carburetor valve adjustment limiter (2013-01-08),
Company Overview
Walbro Engine Management, L.L.C., based in Tucson, AZ, specializes in advanced carburetor technology and fuel delivery systems. The company focuses on developing innovative solutions for ignition control, evaporative emissions management, and precise fuel metering. With a commitment to enhancing engine performance and efficiency, Walbro plays a significant role in the automotive and small engine markets. Their expertise extends to critical components such as throttle valves and position sensors, contributing to improved engine startup and overall functionality.
Profile summary synthesized from public USPTO records and patent filings.

logo

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

Walbro Engine Management, L.l.c. USPTO Patent Assignee Logo
92 Patents

#8 in Tucson, AZ

#49 in Arizona

#4,079 in US

#8,380 in the World

Tucson, AZ (US)
Tucson, AZ, United States of America

Walbro Engine Management, L.l.c.

Forward Citations = 675

85 inventors:

goldMedal George M Pattullo (16 out of 39 patents)

silverMedal Ronald H Roche (13 out of 31 patents)

bronzeMedal John C Woody (10 out of 20 patents)

4.  Martin N Andersson (9 out of 31 patents)

5.  Kevin L Israelson (8 out of 19 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Walbro Engine Management, L.l.c.. Retrieved from https://idiyas.com/company/walbro-engine-management

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]
Loading…