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Hitachi Zosen Corporation

USPTO Granted Patents = 278

% Expired Patents = 24.1

CIPO Patents = 5

EPO Patents = 81

Forward Citations = 1,402

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518 inventors (with patents filed for the assignee):

Tetsuya Inoue (26 out of 33 patents)

Susumu Hikazudani (26 out of 27 patents)

Hidehiko Maehata (19 out of 19 patents)

4. Hiroaki Arai (17 out of 17 patents)

5. Toshiaki Morii (12 out of 12 patents)

6. Daisuke Tamakoshi (12 out of 12 patents)

7. Hiroyuki Daiku (11 out of 11 patents)

8. Takayasu Yokobayashi (10 out of 10 patents)

9. Yoshitoshi Sekiguchi (10 out of 14 patents)

10. Sadao Araki (9 out of 9 patents)

11. Masanori Tsukahara (9 out of 9 patents)

12. Masayoshi Ichiki (9 out of 15 patents)

13. Hideyuki Fukui (7 out of 9 patents)

14. Naoe Hino (7 out of 7 patents)

15. Chikashi Inazumi (7 out of 7 patents)

Core Competencies:

Carbon Nanotube

Fuel Cell

Zeolite Membrane

All-Solid-State Battery

Exhaust Gas Treatment

Eddy Current Flaw Detection

Water Electrolysis

Methane Production

Catalyst Development

Solar Cell

Tunneling Machine

Seawater Desalination

278 patents: Sort by Forward Citations

1. 12139407 - Method for producing carbon nanotube twisted thread, and production apparatus of carbon nanotube twisted thread (2024-11-12),

2. 12123335 - Exhaust gas treatment apparatus, engine system, and exhaust gas treatment method (2024-10-22),

3. 12085550 - Device for testing solubility of drugs in gastrointestinal tract (2024-09-10),

4. 12085538 - Ultrasonic phased array detection device for flaw detection of parallel tubes (2024-09-10),

5. 12055424 - Powder supply apparatus (2024-08-06),

6. 11913124 - Water electrolysis device performance recovery method and water electrolysis device (2024-02-27),

7. 11876172 - All-solid battery and method for producing the same (2024-01-16),

8. 11876171 - All-solid-state battery and production method of the same (2024-01-16),

9. 11848421 - All-solid-state battery and method for manufacturing all-solid-state battery (2023-12-19),

10. 11807590 - Methane production system (2023-11-07),

11. 11799118 - Fuel cell system (2023-10-24),

12. 11784353 - All-solid state secondary cell and production method for the same (2023-10-10),

13. 11666867 - Zeolite separation membrane and production method therefor (2023-06-06),

14. 11512195 - Method for producing filler-resin composite (2022-11-29),

15. 11426760 - Powder film forming method and powder film forming device (2022-08-30),

Company Overview

Hitachi Zosen Corporation, headquartered in Osaka, Japan, specializes in advanced technologies including carbon nanotube applications and fuel cell systems. The company is engaged in developing innovative solutions across various sectors, focusing on energy efficiency and environmental sustainability. Its expertise extends to zeolite membranes, all-solid-state batteries, and exhaust gas treatment technologies. Additionally, Hitachi Zosen is involved in water electrolysis and methane production, contributing to the advancement of clean energy technologies.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

278 Patents

#64 in Osaka

#564 in Japan

#3,183 in the World

Hitachi Zosen Corporation

Forward Citations = 1,402

518 inventors:

Tetsuya Inoue (26 out of 33 patents)

Susumu Hikazudani (26 out of 27 patents)

Hidehiko Maehata (19 out of 19 patents)

4. Hiroaki Arai (17 out of 17 patents)

5. Toshiaki Morii (12 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Zosen Corporation. Retrieved from https://idiyas.com/company/hitachi-zosen

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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