For the Inventor, By the Inventor

Enter assignee name

Sumitomo Cement Co., Ltd.

USPTO Granted Patents = 35

CIPO Patents = 1

Forward Citations = 664

Loading Chart...

Loading Chart...

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 20 patents)

15. Hirotoshi Nagata (2 out of 12 patents)

Core Competencies:

Cement Clinker

Sintering Process

Ceramic Materials

Optical Pattern Recognition

Inorganic Hydraulic Material

Antistatic Coating

Biofunctional Material

Medical Waste Sterilization

Spheroidal Particulate Material

Porous Ceramic

Chrysoberyl Crystal

Gamma-Dicalcium Silicate

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),

Company Overview

Sumitomo Cement Co., Ltd., headquartered in Tokyo, specializes in the production and development of cement and related materials. The company is engaged in various sectors, including construction, infrastructure, and environmental solutions, focusing on innovative technologies to enhance the quality and sustainability of its products. With a commitment to research and development, Sumitomo Cement aims to advance materials science and contribute to the construction industry's evolution, particularly in the Asia-Pacific region.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

35 Patents

#994 in Tokyo

#2,131 in Japan

#19,181 in the World

Sumitomo Cement Co., Ltd.

Forward Citations = 664

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumitomo Cement Co., Ltd.. Retrieved from https://idiyas.com/company/sumitomo-cement-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

Loading…