Forward Citations = 37

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12 inventors (with patents filed for the assignee):

Takashi Fujii (2 out of 5 patents)

Hironori Namioka (2 out of 2 patents)

Takashi Shimamura (1 out of 9 patents)

4. Yoshiharu Watanabe (1 out of 6 patents)

5. Nakamaro Hyodo (1 out of 4 patents)

6. Tetsushi Sakane (1 out of 2 patents)

7. Toshinari Kato (1 out of 1 patent)

8. Tetsuo Shibata (1 out of 1 patent)

9. Masaru Murase (1 out of 1 patent)

10. Hiroyoshi Serizawa (1 out of 1 patent)

11. Hirotoshi Hagiwara (1 out of 7 patents)

12. Sueo Yokota (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 6435763 - KEY HOLE INSERTION FOR MANHOLE AND MANHOLE COVER LOCKING APPARATUS EQUIPPED WITH THE KEY HOLE INSERTION AND MANHOLE COVER LOCKING SYSTEM AND UNLOCKING METHOD AND MANHOLE COVER OPENING AND CLOSING CONTROL SYSTEM (2002-08-20),

2. 6346670 - Solar battery system (2002-02-12),

3. 6126875 - Process for producing a concrete product (2000-10-03),

4. 4864711 - Method of producing lined Hume pipe (1989-09-12),

Haneda Humepipe Co., Ltd. is a leading manufacturer of high-quality hume pipes used in infrastructure projects such as irrigation, drainage, and sewer systems. With over 50 years of experience, the company has established a strong reputation for delivering durable and reliable products. They are committed to providing innovative solutions to meet the evolving needs of the construction industry.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

4 Patents

#2,786 in Tokyo

#7,420 in Japan

Tokyo, Japan

Haneda Humepipe Co., Ltd.