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For the Inventor, By the Inventor

Tokyo, Japan

Tokai Corporation

Calculating rank
USPTO Granted Patents = 139

% Expired Patents = 7.9


Forward Citations = 1,790

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54 inventors (with patents filed for the assignee):

goldMedal Tomio Nitta (48 out of 59 patents)

silverMedal Hideo Mifune (25 out of 26 patents)

bronzeMedal Masaki Saito (19 out of 26 patents)

4.  Isao Inoue (17 out of 39 patents)

5.  Toshihiro Ichikawa (16 out of 18 patents)

6.  Yasuaki Nakamura (15 out of 31 patents)

7.  Masato Seki (14 out of 15 patents)

8.  Tsutomu Shike (14 out of 15 patents)

9.  Yosimitu Kaga (10 out of 10 patents)

10.  Minoru Kanno (8 out of 8 patents)

11.  Noriyuki Serizawa (8 out of 10 patents)

12.  Takashi Tsukamoto (7 out of 34 patents)

13.  Takayuki Suzuki (4 out of 42 patents)

14.  Yuzo Ochiai (4 out of 8 patents)

15.  Toshihiko Eguchi (4 out of 5 patents)


Core Competencies:
Gas Lighter
Ignitor
Safety Device
Fuel Cell
Combustion Apparatus
Piezoelectric Ignition
Flame Reaction
Liquid Fuel
Portable Heater
Vaporization Device
Lighting Device
Catalyst Member

139 patents:

1. 10753895 - Orientation evaluation device, orientation evaluation method, and distribution evaluation device (2020-08-25),
2. D828951 - Lighter (2018-09-18),
3. D759298 - Lighter (2016-06-14),
4. D686879 - Gas lighter (2013-07-30),
5. D676193 - Lighter (2013-02-12),
6. D672085 - Lighter (2012-12-04),
7. 7776487 - Pressure regulator for a fuel cell, fuel supply system for a fuel cell using the regulator, electronic equipment having the fuel supply system, and fuel cartridge for a fuel cell (2010-08-17),
8. 7766032 - Fuel container for fuel cell (2010-08-03),
9. 7568910 - Ignitor (2009-08-04),
10. 7175117 - Substance-atomizing apparatus (2007-02-13),
11. D514742 - Lighter (2006-02-07),
12. 6979190 - Igniting operation mechanism of piezoelectric ignition firing rod (2005-12-27),
13. D510561 - Battery (2005-10-11),
14. 6939128 - Ignition operating mechanism for slide type lighters (2005-09-06),
15. 6837703 - Ignitor (2005-01-04),
Company Overview
Tokai Corporation, headquartered in Tokyo, specializes in the development and manufacturing of gas lighter technology and related safety devices. The company focuses on innovative solutions in ignitors, combustion apparatus, and piezoelectric ignition systems, contributing to advancements in flame reaction and fuel cell technologies. With a commitment to safety and efficiency, Tokai plays a significant role in the gas lighter market, emphasizing quality and reliability in its product offerings.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Tokai Corporation USPTO Patent Assignee Logo
139 Patents

#447 in Tokyo

#905 in Japan

#5,832 in the World

Tokyo, JP
Tokyo, Japan

Tokai Corporation

Forward Citations = 1,790

54 inventors:

goldMedal Tomio Nitta (48 out of 59 patents)

silverMedal Hideo Mifune (25 out of 26 patents)

bronzeMedal Masaki Saito (19 out of 26 patents)

4.  Isao Inoue (17 out of 39 patents)

5.  Toshihiro Ichikawa (16 out of 18 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokai Corporation. Retrieved from https://idiyas.com/company/tokai

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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