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Hioki E.e. Corporation

USPTO Granted Patents = 40

% Expired Patents = 2.5

EPO Patents = 11

Trademarks = 6

Forward Citations = 78

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63 inventors (with patents filed for the assignee):

Toshio Heishi (8 out of 8 patents)

Koki Nakazawa (6 out of 6 patents)

Kenta Ikeda (5 out of 5 patents)

4. Yuki Karasawa (4 out of 4 patents)

5. Kimihiko Yamagishi (4 out of 4 patents)

6. Seiji Onuma (4 out of 10 patents)

7. Yutaka Ashida (3 out of 3 patents)

8. Hiroyoshi Ikeda (3 out of 3 patents)

9. Shin Kasai (3 out of 6 patents)

10. Tomoharu Sakai (3 out of 3 patents)

11. Koichi Tanaka (3 out of 21 patents)

12. Koichi Yanagisawa (3 out of 12 patents)

13. Naoto Nakayama (3 out of 3 patents)

14. Akihiro Shioiri (3 out of 3 patents)

15. Yuki Kawamuro (3 out of 3 patents)

Core Competencies:

Measurement Apparatus

Current Sensor

Testing Instrument

Differential Amplifier

Impedance Measurement

Clamp Meter

Power Efficiency

Digital Multi Meter

Waveform Shaping Circuit

State Determination

Uniformity Output Device

40 patents: Sort by Forward Citations

1. 12693328 - Measurement apparatus and measurement method (2026-07-28),

2. 12681111 - Excitation circuit, current sensor, and measuring device (2026-07-14),

3. 12671382 - Differential amplifier circuit (2026-06-30),

4. 12669460 - Measuring device, measuring system, and measuring method (2026-06-30),

5. 12535531 - Impedance measurement device (2026-01-27),

6. 12512524 - Measurement apparatus, and measurement method (2025-12-30),

7. 12493054 - Measurement apparatus and measurement result display method (2025-12-09),

8. 12487293 - Short circuit detection device and short circuit detection method (2025-12-02),

9. 12392805 - Current measurement component, current measurement device, and current measurement method (2025-08-19),

10. 12326464 - Amplifier circuit and measurement apparatus (2025-06-10),

11. 12113861 - Measurement system, terminal, measurement instrument, and storage medium (2024-10-08),

12. 12066505 - Testing instrument and test method (2024-08-20),

13. 12062483 - Current sensor (2024-08-13),

14. 12000862 - Probe apparatus (2024-06-04),

15. 11988717 - Measurement apparatus of power storage device and measurement method (2024-05-21),

Hioki E.e. Corporation, based in Nagano, Japan, specializes in the development and manufacturing of electrical measuring instruments. The company is recognized for its innovative solutions in fields such as energy measurement, automotive testing, and industrial automation. Hioki's product portfolio includes a wide range of precision instruments designed to enhance efficiency and accuracy in various applications, supporting industries in their pursuit of technological advancement and sustainability.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

40 Patents

#32 in Nagano

#1,978 in Japan

#17,048 in the World

Hioki E.e. Corporation

Forward Citations = 78

63 inventors:

Toshio Heishi (8 out of 8 patents)

Koki Nakazawa (6 out of 6 patents)

Kenta Ikeda (5 out of 5 patents)

4. Yuki Karasawa (4 out of 4 patents)

5. Kimihiko Yamagishi (4 out of 4 patents)

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