For the Inventor, By the Inventor

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Tualatin, OR, United States of America

Kai U.s.a., Ltd.

USPTO Granted Patents = 66

Trademarks = 209

Forward Citations = 1,675

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21 inventors (with patents filed for the assignee):

Kenneth J Onion (26 out of 61 patents)

Grant Woodrow Hawk (9 out of 16 patents)

Gavin Dan Hawk (9 out of 14 patents)

4. Craig Green (9 out of 9 patents)

5. Dennis L Epstein (9 out of 9 patents)

6. Takeshi Ono (6 out of 10 patents)

7. Timothy James Galyean (5 out of 5 patents)

8. James MacNair (3 out of 3 patents)

9. Craig Donald Kemp Green (3 out of 3 patents)

10. Douglas B Flagg (3 out of 5 patents)

11. Tommie Lucas (2 out of 6 patents)

12. Katsumi Hasegawa (2 out of 2 patents)

13. Peter G Kershaw (2 out of 2 patents)

14. Neil Hollis Slater (1 out of 1 patent)

15. Darrell Lewis (1 out of 1 patent)

Core Competencies:

Folding Knife

Locking Mechanism

Safety Lock

Blade Manufacturing Process

Folding Tool Assembly

Assisted-Opening Mechanism

Knife Handle

Utility Knife

Ratchet Type Pocket Clip

Knife Blade

Sharpening Steel

Carabiner Knife

66 patents: Sort by Forward Citations

1. 10071489 - Locking folding knife (2018-09-11),

2. 9707687 - Folding knife with disengageable assisted-opening mechanism (2017-07-18),

3. 9393682 - Folding tool assembly (2016-07-19),

4. 9120234 - Locking folding knife (2015-09-01),

5. 9079320 - Folding knife with disengageable assisted-opening mechanism (2015-07-14),

6. 9038517 - Mandolin slicer (2015-05-26),

7. 8601907 - Knife blade manufacturing process (2013-12-10),

8. 8291597 - Folding knife with sealed mechanism (2012-10-23),

9. RE42906 - Folding knife with safety lock (2011-11-14),

10. 8028873 - Ratchet type pocket clip (2011-10-04),

11. 7979990 - Safety lock mechanism for folding knives (2011-07-19),

12. 7905022 - Folding knife having a locking mechanism (2011-03-15),

13. D633772 - Knife handle (2011-03-08),

14. 7774939 - Stud-lock knife (2010-08-17),

15. 7716839 - Folding knife with removable blade (2010-05-18),

KAI U.S.A., Ltd. is a leading manufacturer and distributor of innovative cutlery and tools based in Tualatin, Oregon. With a rich history of over 100 years, KAI U.S.A. combines traditional Japanese craftsmanship with advanced technology to create high-quality products. Their extensive range includes kitchen knives, professional chef tools, sporting knives, and more. Visit their website to explore their exceptional collection and learn more about their commitment to excellence.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

66 Patents

#3 in Tualatin, OR

#69 in Oregon

#5,290 in US

#10,720 in the World

Tualatin, OR, United States of America

Kai U.s.a., Ltd.

Forward Citations = 1,675

21 inventors:

Kenneth J Onion (26 out of 61 patents)

Grant Woodrow Hawk (9 out of 16 patents)

Gavin Dan Hawk (9 out of 14 patents)

4. Craig Green (9 out of 9 patents)

5. Dennis L Epstein (9 out of 9 patents)

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