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Dai-Ichi High Frequency Co., Ltd.

USPTO Granted Patents = 25

CIPO Patents = 2

EPO Patents = 2

Forward Citations = 141

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58 inventors (with patents filed for the assignee):

Kotaro Hirayama (7 out of 11 patents)

Shuichiro Miyata (4 out of 5 patents)

Takashi Kogin (4 out of 4 patents)

4. Yasuo Watanabe (4 out of 12 patents)

5. Hirotaka Yoshida (3 out of 4 patents)

6. Kenji Sugiyama (2 out of 18 patents)

7. Nobuhiko Matsumoto (2 out of 2 patents)

8. Ryuta Harada (2 out of 2 patents)

9. Takeshi Yamamoto (2 out of 145 patents)

10. Kenji Saita (2 out of 3 patents)

11. Manabu Noguchi (2 out of 9 patents)

12. Yoshimasa Hiramatsu (2 out of 2 patents)

13. Yoichi Matsubara (2 out of 3 patents)

14. Shigenari Hayashi (2 out of 11 patents)

15. Eiji Ishikawa (2 out of 6 patents)

25 patents: Sort by Forward Citations

1. 12404576 - System and method of performing a metal coating process using induction heating techniques (2025-09-02),

2. 11839009 - Portable induction heating device for coating removal (2023-12-05),

3. 11597992 - Ni-based thermal spraying alloy powder and method for manufacturing alloy coating (2023-03-07),

4. 11597009 - Ni—Fe base alloy powder, and method for producing alloy coating using said Ni—Fe base alloy powder (2023-03-07),

5. 11365458 - Post-heating treatment device and post-heating treatment method (2022-06-21),

6. 11053565 - Post-heating treatment device and post-heating treatment method (2021-07-06),

7. 10661248 - Ferromagnetic-particle manufacturing apparatus (2020-05-26),

8. 10576297 - Magnetic flux irradiation devices and components (2020-03-03),

9. 10342989 - Magnetic flux irradiation devices and components (2019-07-09),

10. 8214053 - Body heating device (2012-07-03),

11. 8042498 - Superheated steam generator (2011-10-25),

12. 7807273 - Alloy-coated boiler part and method of welding self-fluxing alloy-coated boiler part (2010-10-05),

13. 7513061 - Sludge dehydrating processor for converting sludge including organic substance into resources of low water content (2009-04-07),

14. 7297908 - Removing method of tube (2007-11-20),

15. 7169480 - Clad pipe (2007-01-30),

DAI-ICHI HIGH FREQUENCY CO., LTD. is a leading manufacturer and supplier of high-frequency and microwave components. With over 50 years of experience, we specialize in providing cutting-edge solutions for wireless communication, satellite broadcasting, medical equipment, and various industries. Our extensive product portfolio includes amplifiers, mixers, filters, antennas, couplers, isolators, and more. We are committed to delivering reliable, high-quality products that meet the evolving demands of our customers. Visit our website to learn more about our innovative solutions and explore our comprehensive range of products.

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Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

25 Patents

#1,046 in Tokyo

#2,517 in Japan

#24,961 in the World

Dai-Ichi High Frequency Co., Ltd.

Forward Citations = 141

58 inventors:

Kotaro Hirayama (7 out of 11 patents)

Shuichiro Miyata (4 out of 5 patents)

Takashi Kogin (4 out of 4 patents)

4. Yasuo Watanabe (4 out of 12 patents)

5. Hirotaka Yoshida (3 out of 4 patents)

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