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Hitachi Tokyo Electronics Co., Ltd.

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USPTO Granted Patents = 21

% Expired Patents = 14.3

Forward Citations = 431

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81 inventors (with patents filed for the assignee):

Yasuhiro Mitsui (4 out of 39 patents)

Takashi Irie (3 out of 13 patents)

Keiji Hasumi (3 out of 3 patents)

4. Shigeki Tozawa (2 out of 13 patents)

5. Mari Nozoe (2 out of 73 patents)

6. Hidetoshi Nishiyama (2 out of 109 patents)

7. Shigeaki Hijikata (2 out of 5 patents)

8. Koji Abe (2 out of 4 patents)

9. Takayoshi Kogano (2 out of 13 patents)

10. Kimio Muramatsu (2 out of 9 patents)

11. Shunichi Iimuro (2 out of 6 patents)

12. Masatomo Kanegae (2 out of 2 patents)

13. Fumio Ito (2 out of 2 patents)

14. Takashi Nagaoka (2 out of 13 patents)

15. Ichiro Gyobu (2 out of 4 patents)

21 patents: Sort by Forward Citations

1. 8558173 - Method of inspecting pattern and inspecting instrument (2013-10-15),

2. 7163886 - Semiconductor integrated circuit device and process for manufacturing the same (2007-01-16),

3. 7112791 - Method of inspecting pattern and inspecting instrument (2006-09-26),

4. 6664549 - Wafer chuck, exposure system, and method of manufacturing semiconductor device (2003-12-16),

5. 6146920 - Bump formation method (2000-11-14),

6. 5593540 - Plasma etching system and plasma etching method (1997-01-14),

7. 5485016 - Atmospheric pressure ionization mass spectrometer (1996-01-16),

8. 5482524 - Atmospheric pressure, elevated temperature gas desorption apparatus (1996-01-09),

9. 5423936 - Plasma etching system (1995-06-13),

10. 5304797 - Gas analyzer for determining impurity concentration of highly-purified (1994-04-19),

11. 5173719 - Method and apparatus for the inspection of patterns (1992-12-22),

12. 5080039 - Processing apparatus (1992-01-14),

13. 5062771 - Vacuum system with a secondary gas also connected to the roughing pump (1991-11-05),

14. 5060841 - wire bonding method and apparatus and method of producing semiconductor (1991-10-29),

15. 5031821 - Semiconductor integrated circuit device, method for producing or (1991-07-16),

Company Overview

Hitachi Tokyo Electronics Co., Ltd. is a prominent player in the technology sector, specializing in advanced electronic systems and components. The company focuses on developing innovative solutions across various domains, including semiconductor manufacturing equipment, industrial automation, and information technology. With a strong emphasis on research and development, Hitachi Tokyo Electronics aims to drive technological advancements that enhance operational efficiency and foster sustainable growth in industries worldwide.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

21 Patents

#1,312 in Tokyo

#2,868 in Japan

#30,018 in the World

Hitachi Tokyo Electronics Co., Ltd.

Forward Citations = 431

81 inventors:

Yasuhiro Mitsui (4 out of 39 patents)

Takashi Irie (3 out of 13 patents)

Keiji Hasumi (3 out of 3 patents)

4. Shigeki Tozawa (2 out of 13 patents)

5. Mari Nozoe (2 out of 73 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Tokyo Electronics Co., Ltd.. Retrieved from https://idiyas.com/company/hitachi-tokyo-electronics-company

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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