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Sumitomo Pipe & Tube Co., Ltd.

USPTO Granted Patents = 17

CIPO Patents = 16

EPO Patents = 11

Forward Citations = 57

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68 inventors (with patents filed for the assignee):

Atsushi Tomizawa (12 out of 34 patents)

Shinjiro Kuwayama (8 out of 13 patents)

Saburo Inoue (7 out of 13 patents)

4. Mitsutoshi Uchida (5 out of 6 patents)

5. Fumihiko Kikuchi (4 out of 5 patents)

6. Naoaki Shimada (2 out of 26 patents)

7. Yusuke Kinoshita (2 out of 11 patents)

8. Manabu Okahisa (2 out of 21 patents)

9. Takashi Suyama (2 out of 12 patents)

10. Yoshitaka Hattori (2 out of 2 patents)

11. Kenji Moroi (2 out of 2 patents)

12. Hiroaki Kubota (1 out of 11 patents)

13. Mitsutoshi Kano (1 out of 13 patents)

14. Mitsusato Hara (1 out of 1 patent)

15. Kazuhiro Ezure (1 out of 2 patents)

17 patents: Sort by Forward Citations

1. 9821357 - Method and apparatus for manufacturing a bent product (2017-11-21),

2. 9457390 - Method and apparatus for manufacturing a bent member (2016-10-04),

3. 9409269 - Positioning apparatus, working system, and hot working apparatus (2016-08-09),

4. 8863565 - Three-dimensionally bending machine, bending-equipment line, and bent product (2014-10-21),

5. 8776568 - Bent member and an apparatus and method for its manufacture (2014-07-15),

6. 8528380 - Bending apparatus (2013-09-10),

7. 8511135 - Bending apparatus (2013-08-20),

8. 8459077 - Manufacturing method for metal member with through hole (2013-06-11),

9. 8419111 - Vehicle body reinforcing member (2013-04-16),

10. 8316683 - Method of manufacturing a bent product and an apparatus and a continuous line for manufacturing the same (2012-11-27),

11. 8166789 - Pipe or tube reducing mill and roll for reducing mill (2012-05-01),

12. 7827839 - Profile element pipe for hydraulic bulging, hydraulic bulging device using the element pipe, hydraulic bulging method using the element pipe, and hydraulically bulged product (2010-11-09),

13. 7694787 - Shock absorbing member for vehicle (2010-04-13),

14. 7484393 - Profile mother pipe for hydraulic bulging, hydraulic bulging apparatus using the same, hydraulic bulging method, and hydraulic bulged product (2009-02-03),

15. 7464571 - Hydroforming method and mold used for the hydroforming method (2008-12-16),

Sumitomo Pipe & Tube Co., Ltd. is a global steel manufacturing company. They specialize in the production of high-quality and advanced steel pipes and tubes. With a strong commitment to innovation and customer satisfaction, Sumitomo Pipe & Tube is known for delivering reliable and durable products to various industries such as automotive, construction, energy, and more. For detailed information about their offerings and services, visit their official website.

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

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USPTO Data Jan 1 1976 - Dec 9 2025

17 Patents

#20 in Ibaraki

#3,157 in Japan

#34,819 in the World

Sumitomo Pipe & Tube Co., Ltd.

Forward Citations = 57

68 inventors:

Atsushi Tomizawa (12 out of 34 patents)

Shinjiro Kuwayama (8 out of 13 patents)

Saburo Inoue (7 out of 13 patents)

4. Mitsutoshi Uchida (5 out of 6 patents)

5. Fumihiko Kikuchi (4 out of 5 patents)

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