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Ryobi Limited

USPTO Granted Patents = 546

Trademarks = 5

Forward Citations = 7,019

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313 inventors (with patents filed for the assignee):

Masakazu Sakamoto (58 out of 61 patents)

Kouichi Miyamoto (38 out of 43 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

Die Casting

Portable Cutting Machine

Printing Press

Vibration Damping Handle

Color Print Quality Control

Ink Transfer Roller

Sheet-Fed Printing

Air Blower Mechanism

Digital Printing Press

Aluminum Alloy

Cooling Arrangement

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),

Ryobi Limited is a multinational Japanese manufacturer of power tools and outdoor equipment. Established in 1943, the company has become a leader in the industry, known for its high-quality products and innovative technology. With a wide range of power tools, such as drills, saws, and sanders, as well as outdoor equipment like lawnmowers and trimmers, Ryobi aims to meet the needs of professionals and DIY enthusiasts alike. They focus on providing reliable and durable products that enhance efficiency and productivity. For more information about Ryobi and their product offerings, please visit their official website.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

546 Patents

#1 in Fuchu

#351 in Japan

#1,729 in the World

Ryobi Limited

Forward Citations = 7,019

313 inventors:

Masakazu Sakamoto (58 out of 61 patents)

Kouichi Miyamoto (38 out of 43 patents)

Koji Ishii (31 out of 31 patents)

4. Etsuo Hiraishi (30 out of 30 patents)

5. Takeshi Shohoji (29 out of 29 patents)

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