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Kioritz Corporation

USPTO Granted Patents = 435

% Expired Patents = 10.8

Forward Citations = 4,488

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202 inventors (with patents filed for the assignee):

Akira Nagashima (96 out of 147 patents)

Giichi Iida (33 out of 33 patents)

Toshio Taomo (27 out of 27 patents)

4. Fumihiko Aiyama (25 out of 26 patents)

5. Fujio Kobayashi (23 out of 34 patents)

6. Tadashige Kondo (18 out of 18 patents)

7. Tsuneo Araki (17 out of 17 patents)

8. Hisashi Inaga (17 out of 18 patents)

9. Hisato Ohsawa (13 out of 15 patents)

10. Junichi Akaike (13 out of 15 patents)

11. Yoshikiyo Kamata (13 out of 13 patents)

12. Hirofumi Yamami (13 out of 13 patents)

13. Noboru Nagai (12 out of 12 patents)

14. Yoshiaki Hironaka (12 out of 15 patents)

15. Isao Masuda (12 out of 22 patents)

Core Competencies:

Internal Combustion Engine

Two-Stroke Engine

Portable Power Machine

Power Blower

Centrifugal Blower Fan

Vibration-Absorbing Coupler

Starter

Cooling System

Lubricating Method

Air Cleaner

Chain Saw

Reciprocating Pump

435 patents: Sort by Forward Citations

1. 7594334 - Vibration-absorbing coupler and portable brush cutter provided with the vibration-absorbing coupler (2009-09-29),

2. 7520690 - Part positioner and part pressing member (2009-04-21),

3. 7520253 - Two-stroke internal combustion engine (2009-04-21),

4. 7363886 - Power unit (2008-04-29),

5. 7322322 - Stratified-scavenging two-stroke internal combustion engine (2008-01-29),

6. 7322114 - Saw chain tensioning mechanism (2008-01-29),

7. 7255072 - Two-stroke internal combustion engine (2007-08-14),

8. 7243622 - Two-stroke internal combustion engine (2007-07-17),

9. 7182059 - Oil pump mechanism for lubricating saw chain (2007-02-27),

10. 7165597 - Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core (2007-01-23),

11. 7101295 - Power transmission device and portable power working machine provided with the same (2006-09-05),

12. 7086837 - Centrifugal blower fan (2006-08-08),

13. 7063061 - Liquid quantity visual confirmation device and reservoir-forming member (2006-06-20),

14. D522532 - Internal combustion engine (2006-06-06),

15. 7055213 - Power blower having a debris-catching cover (2006-06-06),

Kioritz Corporation, based in Tokyo, Japan, specializes in the development and manufacturing of internal combustion engines and related technologies. The company focuses on innovative solutions for portable power machines, including two-stroke engines, power blowers, and centrifugal blower fans. Kioritz is also known for its advancements in vibration-absorbing couplers, starters, and cooling systems, contributing significantly to the efficiency and performance of outdoor power equipment. Their expertise positions them as a key player in the power machinery sector.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

435 Patents

#208 in Tokyo

#422 in Japan

#2,178 in the World

Kioritz Corporation

Forward Citations = 4,488

202 inventors:

Akira Nagashima (96 out of 147 patents)

Giichi Iida (33 out of 33 patents)

Toshio Taomo (27 out of 27 patents)

4. Fumihiko Aiyama (25 out of 26 patents)

5. Fujio Kobayashi (23 out of 34 patents)

Please report any incorrect information to [email protected]

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