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For the Inventor, By the Inventor

Tokyo, Japan

Nippon Sanso Corporation


USPTO Granted Patents = 182

% Expired Patents = 7.7



Forward Citations = 4,891

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217 inventors (with patents filed for the assignee):

goldMedal Toru Goto (20 out of 21 patents)

silverMedal Masashi Yamada (19 out of 81 patents)

bronzeMedal Seiichi Ito (14 out of 28 patents)

4.  Yoshio Ishihara (14 out of 24 patents)

5.  Yasuhiko Komiya (13 out of 18 patents)

6.  Yasuhiro Kowa (13 out of 14 patents)

7.  Tetsuya Kimijima (12 out of 14 patents)

8.  Atsuhiko Tanaka (12 out of 12 patents)

9.  Kunio Hatsumoto (12 out of 14 patents)

10.  Rikiya Kato (11 out of 11 patents)

11.  Takafumi Fujii (10 out of 39 patents)

12.  Akira Nishina (9 out of 9 patents)

13.  Shigeru Hayashida (8 out of 17 patents)

14.  Masato Kawai (8 out of 27 patents)

15.  Koh Matsumoto (8 out of 8 patents)


Core Competencies:
Gas Supply Apparatus
Exhaust Gas Treatment
Nitrogen Production
Cryogenic Air Separation
Gas Analyzing Apparatus
Isotope Enrichment
Gas Purification Method
Laser Spectroscopy
Multi-Gas Analysis System
Air Purification
Trace Impurity Analysis
Thermal Insulation

182 patents:

1. 6966346 - Gas supply apparatus and gas supply method (2005-11-22),
2. 6869579 - Process for treating exhaust gas (2005-03-22),
3. 6857324 - Method and apparatus for measuring concentrations of components of fluid (2005-02-22),
4. 6835287 - Apparatus, method for enrichment of the heavy isotope oxygen and production method for heavy oxygen water (2004-12-28),
5. 6824588 - Apparatus and method for purifying air used in cryogenic air separation (2004-11-30),
6. 6823743 - Method and apparatus for measuring concentrations of components of fluid (2004-11-30),
7. 6800855 - Spectroscopic method for analyzing isotopes by using a semiconductor laser (2004-10-05),
8. 6789583 - Gas supply apparatus and gas supply method (2004-09-14),
9. 6767386 - Method and apparatus for producing nitrogen (2004-07-27),
10. 6752851 - Gas separating and purifying method and its apparatus (2004-06-22),
11. 6717666 - Method and apparatus for measuring nitrogen in a gas (2004-04-06),
12. 6702137 - Plug structure for liquid container (2004-03-09),
13. 6653144 - Method and an apparatus for analyzing trace impurities in gases (2003-11-25),
14. 6648168 - Insulated container (2003-11-18),
15. 6636316 - Spectroscopic method for analyzing a gas by using laser beam (2003-10-21),
Nippon Sanso Corporation, headquartered in Tokyo, specializes in gas separation technology and offers a diverse range of products and services related to gas supply and treatment. The company focuses on innovative solutions in areas such as nitrogen production, cryogenic air separation, and gas purification methods. Additionally, it is involved in advanced applications like isotope enrichment and laser spectroscopy, catering to various industries including manufacturing, healthcare, and environmental management.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

182 Patents

#381 in Tokyo

#754 in Japan

#4,579 in the World

Tokyo, JP
Tokyo, Japan

Nippon Sanso Corporation

Forward Citations = 4,891

217 inventors:

goldMedal Toru Goto (20 out of 21 patents)

silverMedal Masashi Yamada (19 out of 81 patents)

bronzeMedal Seiichi Ito (14 out of 28 patents)

4.  Yoshio Ishihara (14 out of 24 patents)

5.  Yasuhiko Komiya (13 out of 18 patents)

Please report any incorrect information to [email protected]
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