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Walbro Japan, Inc.

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USPTO Granted Patents = 31

% Expired Patents = 32.3

Forward Citations = 260

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31 inventors (with patents filed for the assignee):

Teruhiko Tobinai (8 out of 16 patents)

Hitoshi Terakado (4 out of 8 patents)

Masao Suzuki (4 out of 4 patents)

4. Takashi Horikawa (3 out of 9 patents)

5. Takeshi Kobayashi (3 out of 36 patents)

6. Shinichi Ohgane (3 out of 6 patents)

7. Takeshi Sakaguchi (3 out of 5 patents)

8. Jun Takano (3 out of 9 patents)

9. Katsushi Habu (3 out of 3 patents)

10. Tamio Aihara (3 out of 4 patents)

11. Shin-Ichi Ohgane (3 out of 3 patents)

12. Hiroki Ogasawara (2 out of 5 patents)

13. Yoshiaki Douyama (2 out of 7 patents)

14. Hiroaki Ishii (2 out of 2 patents)

15. Hiraku Watanabe (2 out of 2 patents)

Core Competencies:

Throttle Valve

Carburetor

Fuel Injection

Float Bowl

Stratified Scavenging

Internal Combustion Engine

Fuel Mixture Adjustment

Acceleration Device

Vapor Control

Diaphragm-Type

Two-Stroke Engine

Fuel Flow Control

31 patents: Sort by Forward Citations

1. 7287741 - Rotary throttle valve carburetor (2007-10-30),

2. 7267327 - Throttle valve assembly and dust seal for a carburetor (2007-09-11),

3. 7152852 - Priming system for a float bowl carburetor (2006-12-26),

4. 7114708 - Rotary throttle valve carburetor (2006-10-03),

5. 7097162 - Carburetor with fuel vapor control (2006-08-29),

6. 7007931 - Rotary throttle valve carburetor (2006-03-07),

7. 6945520 - Starting assembly for a carburetor (2005-09-20),

8. 6928996 - Stratified scavenging mechanism of a two-stroke engine (2005-08-16),

9. 6896245 - Stratified scavenging carburetor (2005-05-24),

10. 6871843 - Carburetor with idle fuel supply arrangement (2005-03-29),

11. 6827337 - Rotary throttle valve carburetor (2004-12-07),

12. 6769670 - Starting assembly for a carburetor (2004-08-03),

13. 6736613 - Acceleration fuel pump having a resilient check valve member for a combustion engine carburetor (2004-05-18),

14. 6672570 - Variable venturi carburetor (2004-01-06),

15. 6644631 - Diaphragm-type carburetor (2003-11-11),

Company Overview

Walbro Japan, Inc. is a prominent player in the development and manufacturing of precision-engineered components and systems for the automotive and small engine markets. The company specializes in fuel systems, including carburetors and fuel pumps, which are integral to optimizing engine performance and efficiency. With a strong focus on innovation, Walbro Japan leverages advanced technologies to enhance product reliability and environmental sustainability, serving both domestic and international markets from its Tokyo headquarters.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

31 Patents

#1,043 in Tokyo

#2,272 in Japan

#21,301 in the World

Walbro Japan, Inc.

Forward Citations = 260

31 inventors:

Teruhiko Tobinai (8 out of 16 patents)

Hitoshi Terakado (4 out of 8 patents)

Masao Suzuki (4 out of 4 patents)

4. Takashi Horikawa (3 out of 9 patents)

5. Takeshi Kobayashi (3 out of 36 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Walbro Japan, Inc.. Retrieved from https://idiyas.com/company/walbro-japan

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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