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For the Inventor, By the Inventor

Tokyo, Japan

Hitachi Koki Co., Ltd.


USPTO Granted Patents = 1,267



Trademarks = 7

Forward Citations = 21,570

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879 inventors (with patents filed for the assignee):

goldMedal Nobuhiro Takano (65 out of 74 patents)

silverMedal Masato Sakai (57 out of 57 patents)

bronzeMedal Masanori Okada (52 out of 55 patents)

4.  Tomomasa Nishikawa (49 out of 79 patents)

5.  Susumu Saito (45 out of 136 patents)

6.  Takeshi Taniguchi (43 out of 48 patents)

7.  Kazuhiko Funabashi (42 out of 66 patents)

8.  Katsuhiro Oomori (40 out of 40 patents)

9.  Shinki Ohtsu (39 out of 40 patents)

10.  Hideyuki Tanimoto (38 out of 44 patents)

11.  Yoshitaka Akiba (36 out of 36 patents)

12.  Chikai Yoshimizu (34 out of 36 patents)

13.  Akira Arimoto (32 out of 87 patents)

14.  Shigeharu Ushiwata (30 out of 30 patents)

15.  Haruhisa Fujisawa (29 out of 30 patents)


Core Competencies:
Storage Battery
Electric Power Tool
Portable Electric Circular Saw
Centrifuge
Impact Tool
Battery Charger
Portable Nailer
Electric Working Machine
Miter Saw
Air Compressor
Portable Electric Drill
Power Planer

1,267 patents:

1. D919560 - Storage battery (2021-05-18),
2. D850740 - Engine blower (2019-06-04),
3. D849795 - Engine (2019-05-28),
4. D849495 - Portable electric circular saw (2019-05-28),
5. D844681 - Table cutting machine (2019-04-02),
6. D844558 - Storage battery (2019-04-02),
7. D835962 - Portable nailing machine body (2018-12-18),
8. D831458 - Portable electric power sander (2018-10-23),
9. 10099303 - Electric power tool (2018-10-16),
10. D829523 - Portable electric power circular saw (2018-10-02),
11. 10086529 - Power planer configured to restrain heat generation of control portion (2018-10-02),
12. D826669 - Portable electric driver body (2018-08-28),
13. 10046335 - Centrifuge for pivoting the rotating shafts of the sample container and swing rotor for centrifuge (2018-08-14),
14. 10035253 - Portable work tool (2018-07-31),
15. D823659 - Portable electric nailer (2018-07-24),
Hitachi Koki Co., Ltd. is a Japanese manufacturer of power tools and related products. They offer a wide range of power tools including drills, saws, grinders, and more, designed for professionals and DIY enthusiasts. Hitachi Koki is known for their high-quality products, innovative technology, and commitment to customer satisfaction.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

1,267 Patents

#83 in Tokyo

#172 in Japan

#763 in the World

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Tokyo, Japan

Hitachi Koki Co., Ltd.

Forward Citations = 21,570

879 inventors:

goldMedal Nobuhiro Takano (65 out of 74 patents)

silverMedal Masato Sakai (57 out of 57 patents)

bronzeMedal Masanori Okada (52 out of 55 patents)

4.  Tomomasa Nishikawa (49 out of 79 patents)

5.  Susumu Saito (45 out of 136 patents)

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