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For the Inventor, By the Inventor

Tokyo, Japan

Hitachi Metals Precision, Ltd.


USPTO Granted Patents = 8

% Expired Patents = 50.0


Forward Citations = 23

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14 inventors (with patents filed for the assignee):

goldMedal Yasuhiro Kubota (3 out of 3 patents)

silverMedal Hirokazu Itoh (2 out of 2 patents)

bronzeMedal Makoto Tago (1 out of 2 patents)

4.  Junichi Nakao (1 out of 10 patents)

5.  Shinya Ishihara (1 out of 1 patent)

6.  Hiroshi Takatsuka (1 out of 1 patent)

7.  Mikio Sasaki (1 out of 1 patent)

8.  Masaaki Koga (1 out of 1 patent)

9.  Katsuhisa Ishikawa (1 out of 3 patents)

10.  Masami Hatta (1 out of 1 patent)

11.  Katsumi Iwata (1 out of 1 patent)

12.  Masao Sasaki (1 out of 1 patent)

13.  Ryoji Yamamoto (1 out of 1 patent)

14.  Takayuki Tsukahara (1 out of 1 patent)


8 patents:

1. 10442234 - Booklet finishing device (2019-10-15),
2. 9511502 - Apparatus for cutting sheet stack (2016-12-06),
3. 8678769 - Compressor impeller and method of manufacturing the same (2014-03-25),
4. 8292589 - Casting aluminum alloy, cast compressor impeller comprising the alloy, and process for producing the same (2012-10-23),
5. 8021117 - Impeller for supercharger and method of manufacturing the same (2011-09-20),
6. 7669637 - Impeller for supercharger and method of manufacturing the same (2010-03-02),
7. 4832908 - Low thermal expansion cast alloy (1989-05-23),
8. 4295444 - Automatic coating system for lost wax process (1981-10-20),
Company Overview
Hitachi Metals Precision, Ltd. is a leading manufacturer of high-precision metal components and materials. With a focus on innovation and quality, the company delivers products such as automotive components, magnetic materials, and industrial machinery parts to a global customer base. With a strong commitment to research and development, Hitachi Metals Precision, Ltd. continues to push the boundaries of what is possible in the world of metal engineering.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

8 Patents

#2,150 in Tokyo

#5,045 in Japan

Tokyo, JP
Tokyo, Japan

Hitachi Metals Precision, Ltd.

Forward Citations = 23

14 inventors:

goldMedal Yasuhiro Kubota (3 out of 3 patents)

silverMedal Hirokazu Itoh (2 out of 2 patents)

bronzeMedal Makoto Tago (1 out of 2 patents)

4.  Junichi Nakao (1 out of 10 patents)

5.  Shinya Ishihara (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Metals Precision, Ltd.. Retrieved from https://idiyas.com/company/hitachi-metals-precision

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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