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Ryobi Limited

USPTO Granted Patents = 546

% Expired Patents = 7.3

Trademarks = 4

Forward Citations = 7,085

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313 inventors (with patents filed for the assignee):

Masakazu Sakamoto (58 out of 61 patents)

Kouichi Miyamoto (38 out of 44 patents)

Koji Ishii (31 out of 31 patents)

4. Etsuo Hiraishi (30 out of 30 patents)

5. Takeshi Shohoji (29 out of 29 patents)

6. Tetsuyuki Doi (26 out of 28 patents)

7. Takehiro Kobayashi (24 out of 24 patents)

8. Kiyoshi Hoshino (20 out of 37 patents)

9. Toshiaki Saito (19 out of 32 patents)

10. Teruhisa Numata (16 out of 19 patents)

11. Hideo Aoyama (15 out of 16 patents)

12. Mitsumasa Sato (13 out of 13 patents)

13. Kenso Maehara (13 out of 13 patents)

14. Tatsuya Wada (12 out of 14 patents)

15. Yoshinori Honkawa (12 out of 12 patents)

Core Competencies:

Electric Trimmer

Portable Cutting Machine

Printing Press

Die Casting

Vibration Damping Handle

Sheet-Fed Printing

Golf Club Head

Ink Supply Control

Spinning Reel

Blower Device

Color Matching Method

Impact Power Tool

546 patents: Sort by Forward Citations

1. 9604385 - Electric trimmer (2017-03-28),

2. 9416578 - Door closer (2016-08-16),

3. 9162283 - Tilting gravity casting apparatus and tilting gravity casting method (2015-10-20),

4. 8764897 - Oil type release agent for die casting method for getting solvent mixing ratio, casting method, and spray unit (2014-07-01),

5. 8726526 - Portable cutting machine (2014-05-20),

6. 8550146 - Valve device for gas drainage of metal mold for die-casting and metal mold for die-casting (2013-10-08),

7. 8522657 - Slide-type cutting machine (2013-09-03),

8. 8281874 - Power tool with vibration damping handle (2012-10-09),

9. 8246769 - Speed control method and speed control apparatus for transfer device (2012-08-21),

10. 8220391 - Printing method for printing press and printing press (2012-07-17),

11. 8210531 - Sheet-fed printing press (2012-07-03),

12. 8205548 - Method of winding up transfer film and device for performing transfer printing on printed sheets of paper (2012-06-26),

13. 8127680 - Method and apparatus of controlling quality of printed image for color printing press (2012-03-06),

14. 8114209 - Oil type release agent for die casting method for setting solvent mixing ratio, casting method, and spray unit (2012-02-14),

15. 8001900 - Home position storage unit and home position storage method for use with printing press (2011-08-23),

Company Overview

Ryobi Limited, headquartered in Fuchu, Japan, specializes in the development and manufacturing of electric power tools. The company is recognized for its innovative solutions in various domains, including electric trimmers, portable cutting machines, and advanced printing technologies. Ryobi's expertise extends to die casting and vibration damping handles, enhancing user experience and product durability. With a commitment to quality and innovation, Ryobi plays a significant role in the global power tools market, catering to both professional and consumer needs.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

546 Patents

#1 in Fuchu

#362 in Japan

#1,782 in the World

Ryobi Limited

Forward Citations = 7,085

313 inventors:

Masakazu Sakamoto (58 out of 61 patents)

Kouichi Miyamoto (38 out of 44 patents)

Koji Ishii (31 out of 31 patents)

4. Etsuo Hiraishi (30 out of 30 patents)

5. Takeshi Shohoji (29 out of 29 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ryobi Limited. Retrieved from https://idiyas.com/company/ryobi

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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