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For the Inventor, By the Inventor

Kikugawa, Japan

Fuji Hollow Valve Inc.

Calculating rank
USPTO Granted Patents = 6

% Expired Patents = 50.0


Forward Citations = 19

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10 inventors (with patents filed for the assignee):

goldMedal Hirokazu Morii (3 out of 16 patents)

silverMedal Kenichiro Hirao (3 out of 6 patents)

bronzeMedal Hidenobu Nishio (2 out of 2 patents)

4.  Hyoji Yoshimura (2 out of 10 patents)

5.  Katsumi Nakamura (1 out of 87 patents)

6.  Takahiro Karita (1 out of 1 patent)

7.  Yasushi Maeda (1 out of 4 patents)

8.  Takashi Mishima (1 out of 1 patent)

9.  Hiroyuki Tsuchiyama (1 out of 1 patent)

10.  Satsoshi Narimatsu (1 out of 1 patent)

11.  Satoshi Narimatsu (0 patent)

12.  Yoshimura Hyoji (0 patent)


6 patents:

1. 11215091 - Hollow engine valve and manufacturing method therefor (2022-01-04),
2. 10677110 - Method and device for manufacturing metallic-sodium-filled engine valve (2020-06-09),
3. 10526933 - Hollow engine valve and manufacturing method therefor (2020-01-07),
4. 9757826 - Method of charging a hollow valve with metallic sodium (2017-09-12),
5. 9447711 - Method for production of valve head portion of hollow engine valve and hollow engine valve (2016-09-20),
6. 9427795 - Method for producing a hollow engine valve (2016-08-30),
Company Overview
Fuji Hollow Valve Inc. is a leading manufacturer of high-quality valves for industrial applications. With over 50 years of experience, the company is known for its innovative design, superior performance, and reliable products. Fuji Hollow Valve Inc. serves a wide range of industries including oil and gas, petrochemical, power generation, and more. Their commitment to excellence and customer satisfaction sets them apart in the industry.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

6 Patents

#2 in Kikugawa

#5,990 in Japan

Kikugawa, JP
Kikugawa, Japan

Fuji Hollow Valve Inc.

Forward Citations = 19

10 inventors:

goldMedal Hirokazu Morii (3 out of 16 patents)

silverMedal Kenichiro Hirao (3 out of 6 patents)

bronzeMedal Hidenobu Nishio (2 out of 2 patents)

4.  Hyoji Yoshimura (2 out of 10 patents)

5.  Katsumi Nakamura (1 out of 87 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Fuji Hollow Valve Inc.. Retrieved from https://idiyas.com/company/fuji-hollow-valve

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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