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Espec Corporation

USPTO Granted Patents = 61

% Expired Patents = 9.8

EPO Patents = 12

Forward Citations = 783

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71 inventors (with patents filed for the assignee):

Osamu Matsuguma (13 out of 16 patents)

Shinichirou Sakami (7 out of 7 patents)

Tetsuya Shimada (6 out of 6 patents)

4. Katsuhiko Watabe (6 out of 6 patents)

5. Yasushi Watanabe (6 out of 6 patents)

6. Hiroyuki Enoki (5 out of 5 patents)

7. Hideki Tanaka (4 out of 8 patents)

8. Hiroshi Okuda (4 out of 11 patents)

9. Haruki Seto (4 out of 4 patents)

10. Kouki Sakane (3 out of 3 patents)

11. Hirotaka Jiten (3 out of 3 patents)

12. Kazuhiro Nakamura (2 out of 6 patents)

13. Junichi Inahara (2 out of 3 patents)

14. Michiya Kusaka (2 out of 2 patents)

15. Seiichi Murakami (2 out of 2 patents)

Core Competencies:

Temperature Chamber

Environmental Test Apparatus

Humidity Control Apparatus

Snow Accretion Test

Hygrometer

Battery State Diagnosing

Fuel Cell Evaluation

Cooling Apparatus

Display Screen

Semiconductor Testing

Dew Formation Testing

Incubator

61 patents: Sort by Forward Citations

1. 12742561 - Temperature chamber and environment forming device (2026-09-22),

2. 12680943 - Snow environment test apparatus and snow environment test method (2026-07-14),

3. 12625059 - Snow accretion test method and snow accretion test device (2026-05-12),

4. 12625036 - Environmental test apparatus with bypass flow path with flow rate control portion controlled according to temperature of compressor (2026-05-12),

5. 12618598 - Snow environment test apparatus and snow environment test method (2026-05-05),

6. 12618039 - Incubator (2026-05-05),

7. 12442753 - Environment forming device (2025-10-14),

8. 12331980 - Snow making apparatus and environment forming apparatus (2025-06-17),

9. 12287137 - Snow making apparatus (2025-04-29),

10. 12222278 - Environmental testing device with enhanced electromagnetic effect (2025-02-11),

11. 12159979 - Test jig, test device, and test method for secondary battery (2024-12-03),

12. 11762003 - Environment forming apparatus, program, and method for controlling blower fan (2023-09-19),

13. 10852348 - Contact-type testing device and environmental test method (2020-12-01),

14. D883514 - Stress test chamber (2020-05-05),

15. D882821 - Door for stress test chamber (2020-04-28),

Company Overview

Espec Corporation, headquartered in Osaka, Japan, specializes in environmental testing solutions. The company develops and manufactures advanced equipment such as temperature chambers, humidity control apparatus, and environmental test apparatus designed to simulate various environmental conditions. Their technology is essential for industries requiring rigorous testing, including battery state diagnosing and fuel cell evaluation. Espec's innovations support the reliability and performance of products across diverse sectors, ensuring they meet stringent quality standards.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

61 Patents

#165 in Osaka

#1,512 in Japan

#11,930 in the World

Espec Corporation

Forward Citations = 783

71 inventors:

Osamu Matsuguma (13 out of 16 patents)

Shinichirou Sakami (7 out of 7 patents)

Tetsuya Shimada (6 out of 6 patents)

4. Katsuhiko Watabe (6 out of 6 patents)

5. Yasushi Watanabe (6 out of 6 patents)

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

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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