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Hakuto Co., Ltd.

USPTO Granted Patents = 13

% Expired Patents = 30.8

CIPO Patents = 1

EPO Patents = 3

Trademarks = 1

Forward Citations = 79

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20 inventors (with patents filed for the assignee):

Junichi Nakajima (3 out of 3 patents)

Seiji Tanizaki (3 out of 3 patents)

Eiichi Miyake (3 out of 8 patents)

4. Yasuhiro Nohata (2 out of 3 patents)

5. Kazuo Tajima (1 out of 8 patents)

6. Yoko Imai (1 out of 8 patents)

7. Teruo Horiuchi (1 out of 4 patents)

8. Ryuichiro Kurane (1 out of 20 patents)

9. Norihiko Onishi (1 out of 1 patent)

10. Yoshiharu Yamaguchi (1 out of 1 patent)

11. Hiroshi Kurumado (1 out of 1 patent)

12. Itsuro Murakami (1 out of 1 patent)

13. Akira Togo (1 out of 1 patent)

14. Takanori Shibata (1 out of 1 patent)

15. Tomoo Suzuki (1 out of 3 patents)

13 patents: Sort by Forward Citations

1. 8551364 - Process for inhibiting polymerization of an aromatic vinyl compound (2013-10-08),

2. 8309109 - Cosmetic and method for production thereof (2012-11-13),

3. 8246858 - Process for inhibiting polymerization of an aromatic vinyl compound (2012-08-21),

4. 7202391 - Process for inhibiting polymerization of an aromatic vinyl compound (2007-04-10),

5. 6740528 - Method for measuring concentration of stable free radical compound (2004-05-25),

6. 5409571 - Scale deposit inhibitor for kraft digesters and method for controlling (1995-04-25),

7. 5175279 - Polysaccharide, and water absorbent, moisture absorbent or humectant and (1992-12-29),

8. 5154277 - Electronic parts separation mechanism (1992-10-13),

9. 4800611 - Plate cleaning apparatus and cleaning roller therefor (1989-01-31),

10. 4743325 - Method of sticking film sheet on panel surface (1988-05-10),

11. 4722629 - Adaptor for electronic element stick (1988-02-02),

12. 4659419 - Laminator for sticking film sheet on panel surface (1987-04-21),

13. 4264397 - Apparatus for sticking nonconductive tape having plating perforations to (1981-04-28),

Hakuto Co., Ltd. is a leading Japanese construction company specializing in civil engineering and building construction projects. With over 50 years of experience, Hakuto has built a strong reputation for delivering high-quality, innovative solutions to clients throughout Japan. The company is committed to sustainable practices and safety, and is known for its commitment to excellence in design and construction.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

13 Patents

#1,658 in Tokyo

#3,742 in Japan

#44,950 in the World

Hakuto Co., Ltd.

Forward Citations = 79

20 inventors:

Junichi Nakajima (3 out of 3 patents)

Seiji Tanizaki (3 out of 3 patents)

Eiichi Miyake (3 out of 8 patents)

4. Yasuhiro Nohata (2 out of 3 patents)

5. Kazuo Tajima (1 out of 8 patents)

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