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Sumitomo Osaka Cement Co., Ltd.

USPTO Granted Patents = 479

CIPO Patents = 6

EPO Patents = 92

Trademarks = 2

Forward Citations = 2,405

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315 inventors (with patents filed for the assignee):

Norikazu Miyazaki (86 out of 88 patents)

Junichiro Ichikawa (55 out of 59 patents)

Toru Sugamata (54 out of 55 patents)

4. Mamoru Kosakai (32 out of 32 patents)

5. Satoshi Oikawa (31 out of 70 patents)

6. Takao Kitagawa (30 out of 32 patents)

7. Katsutoshi Kondou (28 out of 28 patents)

8. Toshio Kataoka (27 out of 27 patents)

9. Kei Katou (23 out of 26 patents)

10. Masataka Oyama (23 out of 25 patents)

11. Ryuuta Yamaya (23 out of 23 patents)

12. Ryo Shimizu (22 out of 55 patents)

13. Tokutaka Hara (19 out of 19 patents)

14. Satoru Oshitari (19 out of 22 patents)

15. Shingo Takano (16 out of 16 patents)

Core Competencies:

Optical Modulator

Optical Waveguide Element

Electrostatic Chuck Device

Optical Transmission Device

Dispersion Liquid

Ceramic Joined Body

Optical Control Element

Composite Sintered Body

Light-Emitting Device

Optical Modulation Module

Anti-Fouling Coating Film

Ceramic Substrate

479 patents: Sort by Forward Citations

1. 12504656 - Optical waveguide element, optical waveguide device, and optical transmission apparatus (2025-12-23),

2. 12498612 - Optical modulator and optical transmission apparatus (2025-12-16),

3. 12497498 - Dispersion liquid, composition, sealing member, light-emitting device, illumination tool, display device, method for producing dispersion solution, and method for modifying surfaces of metal oxide particles (2025-12-16),

4. 12474619 - Optical modulator and optical transmission device using same (2025-11-18),

5. 12461306 - Optical waveguide element, optical modulation device using optical waveguide element, and optical transmission device using optical waveguide element (2025-11-04),

6. 12460084 - Dispersion liquid, composition, sealing member, light-emitting device, illumination tool, display device, and method for producing dispersion liquid (2025-11-04),

7. 12424475 - Ceramic joined body, electrostatic chuck device, and method for producing ceramic joined body (2025-09-23),

8. 12422628 - Optical waveguide element, and optical modulation device and optical transmission apparatus using same (2025-09-23),

9. 12399413 - Optical waveguide element and optical modulator (2025-08-26),

10. 12392968 - Optical device, optical modulation device and optical transmission device (2025-08-19),

11. 12372817 - Optical waveguide element, and optical modulation device and optical transmission device using same (2025-07-29),

12. 12345933 - Optical device and optical transmission apparatus using same (2025-07-01),

13. 12339529 - Optical modulator and optical transmission device using same (2025-06-24),

14. 12332534 - Optical waveguide device, optical modulator, optical modulation module, and optical transmission apparatus (2025-06-17),

15. 12321047 - Optical modulator and optical transmission device using same (2025-06-03),

Sumitomo Osaka Cement Co., Ltd. is a Japanese construction materials company. They specialize in manufacturing and selling cement, concrete, and related products. With a long history dating back to 1913, the company has continued to grow and expand its market presence both domestically and internationally. Their commitment to quality, innovation, and sustainability has made them a trusted name in the industry.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

479 Patents

#173 in Tokyo

#384 in Japan

#1,942 in the World

Sumitomo Osaka Cement Co., Ltd.

Forward Citations = 2,405

315 inventors:

Norikazu Miyazaki (86 out of 88 patents)

Junichiro Ichikawa (55 out of 59 patents)

Toru Sugamata (54 out of 55 patents)

4. Mamoru Kosakai (32 out of 32 patents)

5. Satoshi Oikawa (31 out of 70 patents)

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