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Koa Corporation

USPTO Granted Patents = 151

% Expired Patents = 9.3

EPO Patents = 5

Trademarks = 9

Forward Citations = 308

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159 inventors (with patents filed for the assignee):

Keishi Nakamura (19 out of 19 patents)

Koichi Hirasawa (13 out of 13 patents)

Tamotsu Endo (10 out of 10 patents)

4. Kenji Kameko (10 out of 10 patents)

5. Tadahiko Yoshioka (9 out of 9 patents)

6. Kentaro Matsumoto (8 out of 8 patents)

7. Takanori Kikuchi (7 out of 12 patents)

8. Yasuyuki Katase (6 out of 6 patents)

9. Shuhei Matsubara (6 out of 6 patents)

10. Susumu Toyoda (6 out of 6 patents)

11. Yasushi Akahane (6 out of 6 patents)

12. Yoji Gomi (5 out of 6 patents)

13. Kenichi Iguchi (5 out of 28 patents)

14. Koichi Urano (5 out of 5 patents)

15. Satoshi Chiku (5 out of 5 patents)

Core Competencies:

Shunt Resistor

Current Detection

Gas Sensor

Chip Component

Resistive Material

Sensor Device

Manufacturing Method

Flow Rate Sensor

Zinc Oxide Varistor

Thermal Analysis Device

Electronic Component

Noise-Preventing Resistor

151 patents: Sort by Forward Citations

1. 12719345 - Current detection circuit (2026-08-25),

2. 12638321 - Sensor element (2026-05-26),

3. 12580104 - Shunt resistor and shunt resistance device (2026-03-17),

4. 12571752 - Oxygen sensor element and method for manufacturing same (2026-03-10),

5. 12498260 - Sensor device (2025-12-16),

6. 12493010 - Gas sensor (2025-12-09),

7. 12480975 - Current detection device (2025-11-25),

8. 12477661 - Chip component (2025-11-18),

9. 12454740 - Alloy for resistor and use of resistor alloy in resistor (2025-10-28),

10. 12437904 - Resistance alloy for use in shunt resistor, use of resistance alloy in shunt resistor, and shunt resistor using resistance alloy (2025-10-07),

11. 12435391 - Resistance alloy for use in shunt resistor, use of resistance alloy in shunt resistor, and shunt resistor using resistance alloy (2025-10-07),

12. 12424356 - Resistor (2025-09-23),

13. 12412828 - Electronic component (2025-09-09),

14. 12372553 - Jumper element, shunt resistor apparatus, and method of adjusting characteristic of shunt resistor apparatus for current detection (2025-07-29),

15. 12340925 - Chip resistor and method of producing thereof (2025-06-24),

KOA Corporation is a global manufacturing company specializing in electronic components. With over 70 years of experience, we provide innovative solutions and high-quality products to our customers worldwide. Our extensive product line includes resistors, capacitors, inductors, and sensors. We are committed to delivering superior customer service and maintaining strong relationships with our partners. Visit our website for more information and to explore our offerings.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

Koa Corporation

151 Patents

#13 in Nagano

#849 in Japan

#5,392 in the World

Koa Corporation

Forward Citations = 308

159 inventors:

Keishi Nakamura (19 out of 19 patents)

Koichi Hirasawa (13 out of 13 patents)

Tamotsu Endo (10 out of 10 patents)

4. Kenji Kameko (10 out of 10 patents)

5. Tadahiko Yoshioka (9 out of 9 patents)

Please report any incorrect information to [email protected]

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