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For the Inventor, By the Inventor

Miyagi, Japan

Koji Hashimoto


USPTO Granted Patents = 8

% Expired Patents = 37.5


Forward Citations = 81

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15 inventors (with patents filed for the assignee):

goldMedal Koji Hashimoto (8 out of 32 patents)

silverMedal Naokazu Kumagai (4 out of 12 patents)

bronzeMedal Asahi Kawashima (4 out of 17 patents)

4.  Katsuhiko Asami (3 out of 18 patents)

5.  Ahmed Abd El-Moneim (2 out of 3 patents)

6.  Hideaki Yoshioka (2 out of 9 patents)

7.  Hiroyuki Takano (1 out of 18 patents)

8.  Kouichi Izumiya (1 out of 4 patents)

9.  Zenta Kato (1 out of 3 patents)

10.  Hiroyuki Shinomiya (1 out of 5 patents)

11.  Akira Mitsuhashi (1 out of 16 patents)

12.  Hiroki Habazaki (1 out of 8 patents)

13.  Marek Danielewski (1 out of 5 patents)

14.  Stanislaw Mrowec (1 out of 5 patents)

15.  Yoshio Takizawa (1 out of 3 patents)


8 patents:

1. 9731278 - Catalyst for methanation of carbon oxides, preparation method of the catalyst and process for the methanation (2017-08-15),
2. 7914653 - Anode for electrochemical reaction (2011-03-29),
3. 7803260 - Oxygen evolution electrode (2010-09-28),
4. 5634989 - Amorphous nickel alloy having high corrosion resistance (1997-06-03),
5. 5549797 - Highly corrosion-resistant amorphous alloys (1996-08-27),
6. 5482577 - Amorphous alloys resistant against hot corrosion (1996-01-09),
7. 5041175 - Amorphous aluminum alloys (1991-08-20),
8. 4964967 - Surface activated alloy electrodes and process for preparing them (1990-10-23),
Company Overview
Koji Hashimoto is a renowned fashion designer known for his unique and innovative designs. With a focus on sustainability and ethical practices, his eponymous brand showcases a blend of modern aesthetics and traditional craftsmanship. His collections have been featured in top fashion magazines and worn by celebrities on red carpets around the world.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

8 Patents

#9 in Miyagi

#5,037 in Japan

Miyagi, JP
Miyagi, Japan

Koji Hashimoto

Forward Citations = 81

15 inventors:

goldMedal Koji Hashimoto (8 out of 32 patents)

silverMedal Naokazu Kumagai (4 out of 12 patents)

bronzeMedal Asahi Kawashima (4 out of 17 patents)

4.  Katsuhiko Asami (3 out of 18 patents)

5.  Ahmed Abd El-Moneim (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Koji Hashimoto. Retrieved from https://idiyas.com/company/koji-hashimoto

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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