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For the Inventor, By the Inventor

Tokyo, Japan

Hitachi Plant Technologies, Ltd.


USPTO Granted Patents = 136

% Expired Patents = 74.3



Forward Citations = 675

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283 inventors (with patents filed for the assignee):

goldMedal Tatsuo Sumino (25 out of 38 patents)

silverMedal Kazuichi Isaka (19 out of 25 patents)

bronzeMedal Hiromi Kobayashi (8 out of 38 patents)

4.  Naoki Abe (8 out of 24 patents)

5.  Toshiaki Matsuo (8 out of 27 patents)

6.  Tetsuya Kuwano (8 out of 10 patents)

7.  Naruyasu Okamoto (8 out of 12 patents)

8.  Noe Miyashita (6 out of 12 patents)

9.  Hideo Nishida (6 out of 25 patents)

10.  Kenichiro Oka (6 out of 11 patents)

11.  Masayuki Kamikawa (6 out of 12 patents)

12.  Kiyokazu Takemura (6 out of 8 patents)

13.  Shigeyoshi Kawaguchi (6 out of 8 patents)

14.  Tokuo Shimizu (6 out of 7 patents)

15.  Tetsunori Yano (6 out of 6 patents)


Core Competencies:
Wastewater Treatment
Microbial Detection
Centrifugal Compressor
Turbo Machinery
Microreactor System
Membrane Separation
Hydrogen Production
Polymer Production
Fluid Mixer
Nucleic Acid Detection
Solder Ball Printing
Construction Methods

136 patents:

1. 8628953 - Capturing carrier, capturing device, analysis system using the same, and method for capturing and testing microorganisms (2014-01-14),
2. 8616843 - Turbo machinery (2013-12-31),
3. 8597520 - Wastewater treatment method and wastewater treatment apparatus (2013-12-03),
4. 8591841 - Microreactor system (2013-11-26),
5. 8569047 - Microbial detection apparatus, microbial detection method, and sample container used therein (2013-10-29),
6. 8562829 - Magnetic separation apparatus and waste water treatment apparatus (2013-10-22),
7. 8558035 - Reaction process utilizing critical water (2013-10-15),
8. 8551417 - Reactor and reaction plant (2013-10-08),
9. 8524345 - Pipe module (2013-09-03),
10. 8499527 - Building construction method and room module (2013-08-06),
11. D686276 - Cream solder printer (2013-07-16),
12. 8481885 - Laser narrow groove welding apparatus and welding method (2013-07-09),
13. 8475131 - Centrifugal compressor (2013-07-02),
14. 8465644 - Membrane element in immersion type membrane separation apparatus (2013-06-18),
15. 8451267 - Pipe installation support apparatus (2013-05-28),
Company Overview
Hitachi Plant Technologies, Ltd., based in Tokyo, specializes in advanced solutions for wastewater treatment and environmental sustainability. The company focuses on innovative technologies such as microbial detection, membrane separation, and hydrogen production, contributing to cleaner water and energy solutions. With expertise in turbo machinery and microreactor systems, Hitachi Plant Technologies aims to enhance industrial processes and promote efficient resource utilization, addressing critical environmental challenges in various sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

136 Patents

#452 in Tokyo

#914 in Japan

#5,940 in the World

Tokyo, JP
Tokyo, Japan

Hitachi Plant Technologies, Ltd.

Forward Citations = 675

283 inventors:

goldMedal Tatsuo Sumino (25 out of 38 patents)

silverMedal Kazuichi Isaka (19 out of 25 patents)

bronzeMedal Hiromi Kobayashi (8 out of 38 patents)

4.  Naoki Abe (8 out of 24 patents)

5.  Toshiaki Matsuo (8 out of 27 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Plant Technologies, Ltd.. Retrieved from https://idiyas.com/company/hitachi-plant-technologies

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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