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For the Inventor, By the Inventor

Ichihara, Japan

Masahiro Oka

This inventor holds 12 USPTO granted patents. Top assignees: Showa Denko K.k., Kabushiki Kaisha Toshiba, Tohoku University. Active years: 2003-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Oka. Retrieved from https://idiyas.com/inventor/masahiro-oka-pb0nll5j

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

Calculating rank
USPTO Granted Patents = 12

% Patents Active = 33.3

Average Co-Inventor Count = 2.8

ph-index = 3

Forward Citations = 18(Granted Patents)


Location History:

  • Yokohama, JP (2003 - 2011)
  • Ichihara, JP (2008 - 2012)

Company Filing History:

goldMedal12 out of 1,961 
 
Showa Denko K.k.
 patents
silverMedal10 out of 53,286 
 
Kabushiki Kaisha Toshiba
 patents
bronzeMedal4 out of 1,054 
 
Tohoku University
 patents
4. 1 out of 834,601 
Other
 patents
where one patent can have more than one assignee

Years Active: 2003-2012

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12 patents (USPTO):Explore Patents
1. 8221637 - Method and apparatus for manufacturing magnetic recording media (2012-07-17),
2. 8116035 - Magnetic recording medium having a secondary recording layer made of a material having a negative crystal magnetic anisotropy and magnetic recording and reproducing apparatus (2012-02-14),
3. 7943248 - Perpendicular magnetic recording media, production process thereof, and perpendicular magnetic recording and reproducing apparatus (2011-05-17),
4. 7879466 - Perpendicular magnetic recording medium, and perpendicular magnetic recording and reproducing apparatus (2011-02-01),
5. 7862915 - Magnetic recording medium and magnetic recording/reproducing apparatus (2011-01-04),
6. 7771602 - Method and apparatus for manufacturing magnetic recording media (2010-08-10),
7. 7744966 - Production process of perpendicular magnetic recording medium (2010-06-29),
8. 7687158 - Perpendicular magnetic recording medium and perpendicular magnetic recording/reproducing apparatus (2010-03-30),
9. 7635529 - Substrate for magnetic recording media, magnetic recording media and magnetic recording apparatus (2009-12-22),
10. 7580223 - Magnetic recording media, substrate for magnetic recording media, and magnetic recording apparatus (2009-08-25),
11. 7314833 - Method for manufacturing substrate for discrete track recording media and method for manufacturing discrete track recording media (2008-01-01),
12. 6607848 - Magnetic recording medium and magnetic recording device (2003-08-19),
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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