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Waterworks Technology Development Organization Co., Ltd.

USPTO Granted Patents = 54

CIPO Patents = 2

EPO Patents = 19

Forward Citations = 360

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34 inventors (with patents filed for the assignee):

Taichi Sato (18 out of 23 patents)

Yasushi Fujita (17 out of 22 patents)

Kikuo Saito (7 out of 7 patents)

4. Kosuke Sakai (6 out of 6 patents)

5. Yasuyuki Nagamori (4 out of 4 patents)

6. Hiroyuki Bekki (4 out of 5 patents)

7. Tamotsu Maenishi (4 out of 4 patents)

8. Akihito Totsugi (4 out of 4 patents)

9. Gou Horikawa (3 out of 3 patents)

10. Daisuke Kuwagaki (3 out of 3 patents)

11. Mitsuhiro Mori (3 out of 8 patents)

12. Go Horikawa (3 out of 4 patents)

13. Shintaro Suzuki (3 out of 3 patents)

14. Kenji Kitani (3 out of 3 patents)

15. Shuhei Azuma (2 out of 6 patents)

Core Competencies:

Pipe Joint

Flexible Joint

Gate Valve

Corrosion Prevention

Fluid Pipeline Structure

Hermetically Sealing Device

Branch Pipe Formation

Inflatable Bag Flow Blocker

Pipeline Closing Apparatus

Sluice Valve

Expandable-Contractible Pipe

Separation Prevention Device

54 patents: Sort by Forward Citations

1. 12422081 - Branch pipe forming apparatus, lid doubling as valve element, branch pipe forming apparatus with lid doubling as valve element, and branch pipe formation method (2025-09-23),

2. 12031649 - Disengagement prevention structure for pipe connecting portion (2024-07-09),

3. 11892111 - Housing device and method for mounting housing device (2024-02-06),

4. 11655901 - Gate valve (2023-05-23),

5. 11512801 - Pipe joint and method of assembling pipe joint (2022-11-29),

6. 11421811 - Hermetically sealing device and hermetically sealing method (2022-08-23),

7. 11287058 - Valve removal method of fluid pipeline structure, fluid pipeline structure, and valve device (2022-03-29),

8. 11248732 - Gate valve (2022-02-15),

9. 10989313 - Valve device (2021-04-27),

10. 10612688 - Corrosion prevention apparatus and corrosion prevention method for cut faces of pipes (2020-04-07),

11. 10161555 - Coated expandable-contractible flexible pipe (2018-12-25),

12. 10151410 - Extending/contracting flexible pipe and method for assembling extending/contracting flexible pipe (2018-12-11),

13. 10088085 - Extendable and contractible flexible joint (2018-10-02),

14. 9890883 - Pipe joint, packing ring, and method for mounting pipe joint (2018-02-13),

15. 9638347 - Device for blocking a flow passage using an inflatable bag (2017-05-02),

Waterworks Technology Development Organization Co., Ltd. is a company focused on developing advanced technology solutions for the water industry. With a team of dedicated professionals and years of experience, we strive to provide innovative and sustainable solutions for water purification, treatment, and management. Through our cutting-edge technology and commitment to quality, we aim to contribute to a world where clean and safe water is accessible to all.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

54 Patents

#152 in Osaka

#1,593 in Japan

#12,747 in the World

Waterworks Technology Development Organization Co., Ltd.

Forward Citations = 360

34 inventors:

Taichi Sato (18 out of 23 patents)

Yasushi Fujita (17 out of 22 patents)

Kikuo Saito (7 out of 7 patents)

4. Kosuke Sakai (6 out of 6 patents)

5. Yasuyuki Nagamori (4 out of 4 patents)

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