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Hitachi Seiko, Ltd.

USPTO Granted Patents = 60

Forward Citations = 736

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83 inventors (with patents filed for the assignee):

Yasuhiko Kanaya (23 out of 26 patents)

Kunio Arai (14 out of 27 patents)

Tamio Otani (11 out of 15 patents)

4. Tamio Ohtani (6 out of 6 patents)

5. Takahiro Yamada (4 out of 61 patents)

6. Hiroshi Aoyama (4 out of 11 patents)

7. Eiji Yoshino (4 out of 7 patents)

8. Yasumasa Matsuda (4 out of 34 patents)

9. Toshiyuki Makino (4 out of 4 patents)

10. Takeshi Araya (4 out of 17 patents)

11. Akira Irie (4 out of 7 patents)

12. Kiyoharu Nakajima (3 out of 5 patents)

13. Shigeru Kakumoto (3 out of 14 patents)

14. Masao Nishigai (3 out of 4 patents)

15. Hiromi Nishiyama (3 out of 3 patents)

Core Competencies:

Printed Circuit Boards

Arc Welding

Laser Processing

CNC Control

Electric Discharge Machining

Tool Detection

Ink-Jet Recording

Drilling Apparatus

Grinding Machines

Figure Retrieval

Servo Control Systems

Tool Exchanging Devices

60 patents: Sort by Forward Citations

1. 5888036 - Drill bit and step feeding method (1999-03-30),

2. 5876156 - Printed-circuit board holding device (1999-03-02),

3. 5824991 - Pulsed arc welding method and apparatus (1998-10-20),

4. 5756378 - Method of and apparatus for laser processing (1998-05-26),

5. 5390446 - Grinding method and grinding machine (1995-02-21),

6. 5349159 - Consumable-electrode AC gas shield arc welding method and apparatus (1994-09-20),

7. 5332341 - Pressure foot of printed circuit board drilling apparatus (1994-07-26),

8. 5315072 - Printed wiring board having blind holes (1994-05-24),

9. 5266878 - CNC apparatus for controlling a plurality of machines (1993-11-30),

10. 5225660 - Consumable-electrode AC gas shield arc welding method and apparatus (1993-07-06),

11. 5220715 - Printed circuit board processing apparatus (1993-06-22),

12. 5214991 - Punching apparatus (1993-06-01),

13. 5205805 - Printed circuit board processing machine incorporating tool holding (1993-04-27),

14. 5200906 - Wire-cut electric discharge machining method (1993-04-06),

15. 5199830 - Printed circuit board presser device in drilling machine (1993-04-06),

Hitachi Seiko, Ltd. is a leading provider of precision tools and equipment for various industries. With decades of experience in manufacturing high-quality products, the company has established a reputation for innovation and reliability. Their wide range of solutions includes cutting tools, measuring instruments, and industrial machinery, making them a trusted partner for businesses worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

60 Patents

#627 in Tokyo

#1,492 in Japan

#11,663 in the World

Hitachi Seiko, Ltd.

Forward Citations = 736

83 inventors:

Yasuhiko Kanaya (23 out of 26 patents)

Kunio Arai (14 out of 27 patents)

Tamio Otani (11 out of 15 patents)

4. Tamio Ohtani (6 out of 6 patents)

5. Takahiro Yamada (4 out of 61 patents)

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