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For the Inventor, By the Inventor

Tokyo, Japan

Tomotaka Yokoyama

This inventor holds 9 USPTO granted patents. Top assignees: Hoya Corporation, Hoya Glass Disk (Thailand) Ltd.. Active years: 2003-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tomotaka Yokoyama. Retrieved from https://idiyas.com/inventor/tomotaka-yokoyama

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

USPTO Granted Patents = 9

% Patents Active = 66.7

Average Co-Inventor Count = 4.5

ph-index = 5

Forward Citations = 118(Granted Patents)


Location History:

  • Tokyo, JP (2003 - 2013)
  • Shinjuku-ku, JP (2004 - 2014)

Company Filing History:

goldMedal9 out of 2,569 
 
Hoya Corporation
 patents
silverMedal3 out of 11 
 
Hoya Glass Disk (Thailand) Ltd.
 patents
where one patent can have more than one assignee

Years Active: 2003-2014

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9 patents (USPTO):Explore Patents
1. 8640497 - Method of manufacturing glass substrate for magnetic disk and system for manufacturing glass substrate for magnetic disk (2014-02-04),
2. 8567044 - Method of manufacturing a magnetic disk (2013-10-29),
3. 8033008 - Method for supporting manufacture of a magnetic disk (2011-10-11),
4. 7220446 - Management technique of friction coefficient based on surface roughness, substrate for information recording medium, information recording medium and manufacture method thereof (2007-05-22),
5. 6852010 - Substrate for an information recording medium, information recording medium using the substrate, and method of producing the substrate (2005-02-08),
6. 6790509 - Substrate for information recording medium, information recording medium, and method for controlling surface of substrate for information recording medium (2004-09-14),
7. 6706427 - Management technique of friction coefficient based on surface roughness, substrate for information recording medium, information recording medium and manufacture method thereof (2004-03-16),
8. 6670055 - Magnetic recording medium and manufacturing method therefor (2003-12-30),
9. 6537648 - Substrate for an information recording medium, information recording medium using the substrate and method of producing the substrate (2003-03-25),

Title: Innovations by Tomotaka Yokoyama

Introduction

Tomotaka Yokoyama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of manufacturing glass substrates for magnetic disks. With a total of nine patents to his name, Yokoyama's work has had a substantial impact on the industry.

Latest Patents

Yokoyama's latest patents include a method of manufacturing glass substrates for magnetic disks and a system for manufacturing these substrates. The first patent aims to reduce the inner diameter dimensional error in magnetic-disk glass substrate manufacturing. This method involves a chemical strengthening step where multiple glass substrates are treated with solutions from various chemical strengthening baths. It also includes an inner diameter measuring step to assess the inner diameter of each substrate before treatment. The process ensures that the final inner diameters meet desired specifications. The second patent focuses on defect inspection for glass substrates, utilizing a surface defect detector to record defect information. This information is crucial for customers in manufacturing magnetic disks with discrete track recording mediums.

Career Highlights

Throughout his career, Tomotaka Yokoyama has worked with notable companies such as Hoya Corporation and Hoya Glass Disk (Thailand) Ltd. His experience in these organizations has allowed him to refine his expertise in glass substrate manufacturing.

Collaborations

Yokoyama has collaborated with esteemed colleagues, including Hiroshi Tomiyasu and Kouji Takahashi. Their combined efforts have contributed to advancements in the field of magnetic disk technology.

Conclusion

Tomotaka Yokoyama's innovative patents and career achievements highlight his significant role in the advancement of glass substrate manufacturing for magnetic disks. His contributions continue to influence the industry and pave the way for future innovations.

Profile summary based on public USPTO records.
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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