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Nihon Micro Coating Co., Ltd.

USPTO Granted Patents = 51

% Expired Patents = 27.5

EPO Patents = 1

Forward Citations = 253

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60 inventors (with patents filed for the assignee):

Yuji Horie (26 out of 34 patents)

Hiromitsu Okuyama (10 out of 10 patents)

Noriyuki Kumasaka (8 out of 59 patents)

4. Jun Watanabe (7 out of 79 patents)

5. Jun Tamura (6 out of 73 patents)

6. Takuya Nagamine (5 out of 6 patents)

7. Kazuei Yamaguchi (5 out of 5 patents)

8. Izuru Morioka (5 out of 6 patents)

9. Satoru Sato (4 out of 6 patents)

10. Mitsuru Saito (4 out of 46 patents)

11. Sanaki Horimoto (4 out of 4 patents)

12. Takehiro Watanabe (4 out of 4 patents)

13. Takabumi Marukawa (4 out of 4 patents)

14. Nobuyoshi Watanabe (3 out of 19 patents)

15. Tetsujiro Tada (3 out of 3 patents)

Core Competencies:

Substrate Polishing

Polishing Device

Polishing Material

Diamond Clusters

Texturing Method

Magnetic Hard Disk

Optical Fiber Connector

Cleaning Method

Polishing Cloth

Chemical Mechanical Polishing

Abrasive Sheet

Texturing Slurry

51 patents: Sort by Forward Citations

1. 8814635 - Substrate polishing method and device (2014-08-26),

2. 8348721 - Method of producing glass substrate for perpendicular magnetic recording disk (2013-01-08),

3. 8148301 - Method for polishing tape-shaped substrate for oxide superconductor, oxide superconductor, and base material for oxide superconductor (2012-04-03),

4. 8143194 - Method for polishing tape-shaped substrate for oxide superconductor, oxide superconductor, and base material for oxide superconductor (2012-03-27),

5. 8049990 - Cleaning tape and method of producing same (2011-11-01),

6. 8029333 - Device for polishing peripheral edge of semiconductor wafer (2011-10-04),

7. 7927187 - Method of polishing a target surface (2011-04-19),

8. 7857876 - Method of producing polishing material comprising diamond clusters (2010-12-28),

9. 7828628 - Method of polishing hard crystal substrate (2010-11-09),

10. 7811972 - Method of polishing tape-shaped substrate and substrate for oxide superconductor (2010-10-12),

11. 7790046 - Method of texturing (2010-09-07),

12. 7776793 - System and method for polishing surface of tape-like metallic base material (2010-08-17),

13. 7631419 - Disk processing device and method (2009-12-15),

14. 7585341 - Polishing material comprising diamond clusters (2009-09-08),

15. 7578723 - Polishing tape and polishing device using same (2009-08-25),

Company Overview

Nihon Micro Coating Co., Ltd. is a Tokyo-based company specializing in advanced surface polishing technology. The organization focuses on the development and manufacturing of innovative solutions for substrate polishing, polishing devices, and polishing materials. Their expertise extends to diamond clusters, texturing methods, and cleaning techniques, catering to various applications including magnetic hard disks and optical fiber connectors. With a commitment to precision and quality, Nihon Micro Coating plays a significant role in enhancing surface finishes across multiple industries.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

51 Patents

#786 in Tokyo

#1,684 in Japan

#13,776 in the World

Nihon Micro Coating Co., Ltd.

Forward Citations = 253

60 inventors:

Yuji Horie (26 out of 34 patents)

Hiromitsu Okuyama (10 out of 10 patents)

Noriyuki Kumasaka (8 out of 59 patents)

4. Jun Watanabe (7 out of 79 patents)

5. Jun Tamura (6 out of 73 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nihon Micro Coating Co., Ltd.. Retrieved from https://idiyas.com/company/nihon-micro-coating-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]

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