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Sumitomo Cement Co., Ltd.

USPTO Granted Patents = 35

CIPO Patents = 1

Forward Citations = 663

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102 inventors (with patents filed for the assignee):

Norio Yokota (6 out of 8 patents)

Shigehide Takagi (5 out of 5 patents)

Toshiharu Takesue (4 out of 15 patents)

4. Yasuhiro Takemura (4 out of 11 patents)

5. Chikanori Kumagai (4 out of 8 patents)

6. Katsuji Mukai (4 out of 9 patents)

7. Mikio Murao (4 out of 15 patents)

8. Isao Hashimoto (4 out of 11 patents)

9. Nichitaka Sato (4 out of 6 patents)

10. Shozo Kanamori (4 out of 6 patents)

11. Toshiyuki Ishinohachi (4 out of 7 patents)

12. Shigeru Yamauchi (3 out of 7 patents)

13. Eiki Arai (3 out of 3 patents)

14. Tatsuya Watanabe (2 out of 19 patents)

15. Hirotoshi Nagata (2 out of 12 patents)

35 patents: Sort by Forward Citations

1. 5944513 - Apparatus for manufacturing cement clinker (1999-08-31),

2. 5681885 - Coating material for antistatic high refractive index film formation (1997-10-28),

3. 5619596 - Method and apparatus for optical pattern recognition (1997-04-08),

4. 5600485 - Optical pattern recognition system method of ferroelectric liquid (1997-02-04),

5. 5595599 - Method and apparatus for sintering cement clinker (1997-01-21),

6. 5536167 - Method and apparatus for sintering cement clinker (1996-07-16),

7. 5526448 - Optical waveguide modulator having a reduced D.C. drift (1996-06-11),

8. 5478234 - Apparatus for manufacturing cement clinker (1995-12-26),

9. 5446339 - Cathode ray tube having antistatic/anti-reflection film-covered (1995-08-29),

10. 5374989 - Apparatus for identifying an object utilizing a tracking means and an (1994-12-20),

11. 5359690 - Cutting method and apparatus for removing a secondary coating layer from (1994-10-25),

12. 5256271 - Method of immobilizing biofunctional material, and element prepared (1993-10-26),

13. 5253991 - Apparatus for producing spheroidal inorganic particulate material (1993-10-19),

14. 5248486 - Device, agent and process for medical waste sterilization (1993-09-28),

15. 5239595 - Optical method for identifying or recognizing a pattern to be identified (1993-08-24),

Sumitomo Cement Co., Ltd. is a leading cement manufacturing company based in Japan. With a rich history spanning over several decades, we specialize in the production, distribution, and sale of high-quality cement products. Our commitment to sustainable development, innovation, and customer satisfaction has made us a trusted and reliable name in the industry. Visit our website to learn more about our extensive product range and solutions for various construction needs.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

35 Patents

#867 in Tokyo

#2,078 in Japan

#18,610 in the World

Sumitomo Cement Co., Ltd.

Forward Citations = 663

102 inventors:

Norio Yokota (6 out of 8 patents)

Shigehide Takagi (5 out of 5 patents)

Toshiharu Takesue (4 out of 15 patents)

4. Yasuhiro Takemura (4 out of 11 patents)

5. Chikanori Kumagai (4 out of 8 patents)

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