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For the Inventor, By the Inventor

Sendai, Japan

Masashi Somezawa

This inventor holds 18 USPTO granted patents, primarily in Magnetic Recording Media. Top assignees: Sony Corporation, Shin-Etsu Chemical Co., Ltd., Nippon Polyurethane Industry Co., Ltd.. Active years: 1978-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masashi Somezawa. Retrieved from https://idiyas.com/inventor/masashi-somezawa

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

Calculating rank
USPTO Granted Patents = 18

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 11

Forward Citations = 279(Granted Patents)


Location History:

  • Sendai, JP (1978 - 1987)
  • Miyagi, JP (1983 - 1991)

Company Filing History:

goldMedal18 out of 58,148 
 
Sony Corporation
 patents
silverMedal5 out of 5,989 
 
Shin-Etsu Chemical Co., Ltd.
 patents
bronzeMedal1 out of 35 
 
Nippon Polyurethane Industry Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1978-1991

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Areas of Expertise:
Magnetic Recording Medium
Fungicide
Electron Radiation Curable Resin
Thermoplastic Polyurethane Resins
Diorganopolysiloxane Compounds
Amino Lubricating Layer
Manufacturing Method
Treatment Method
Magnetic Recording Media
18 patents (USPTO):Explore Patents
1. 5028497 - Magnetic recording medium utilizing a fungicide (1991-07-02),
2. 4654260 - Magnetic recording medium (1987-03-31),
3. 4637959 - Magnetic recording medium (1987-01-20),
4. 4634633 - Magnetic recording medium (1987-01-06),
5. 4521486 - Magnetic recording medium (1985-06-04),
6. 4508752 - Method for manufacturing a magnetic recording medium (1985-04-02),
7. 4503198 - Electron radiation curable resin (1985-03-05),
8. 4501801 - Magnetic recording medium (1985-02-26),
9. 4435485 - Magnetic recording medium (1984-03-06),
10. 4434210 - Magnetic recording medium (1984-02-28),
11. 4431703 - Magnetic recording medium (1984-02-14),
12. 4400498 - Thermoplastic polyurethane resins (1983-08-23),
13. 4396674 - Magnetic recording medium with amino lubricating layer (1983-08-02),
14. 4384100 - Novel diorganopolysiloxane compounds (1983-05-17),
15. 4369230 - Magnetic recording medium (1983-01-18),

Title: Masashi Somezawa: Innovator in Magnetic Recording Technology

Introduction

Masashi Somezawa is a prominent inventor based in Sendai, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 18 patents. His work has been instrumental in advancing the capabilities of magnetic recording media.

Latest Patents

Somezawa's latest patents include a magnetic recording medium utilizing a fungicide. This innovative medium features a magnetic layer on one surface of a non-magnetic base, with a backcoat layer on the other surface. The medium incorporates anti-fungus agents such as p-tolyldiiodemethylsulfone, 2,3,3-triiodoallyl alcohol, and 2-methoxycarbonylaminobenzimidazole, enhancing its durability and performance.

Career Highlights

Throughout his career, Masashi Somezawa has worked with notable companies, including Sony Corporation and Shin-Etsu Chemical Co., Ltd. His expertise in magnetic recording technology has led to numerous advancements in the industry.

Collaborations

Some of his notable coworkers include Hiroshi Yoshioka and Yoshinobu Ninomiya. Their collaborative efforts have contributed to the success of various projects in the field of magnetic recording.

Conclusion

Masashi Somezawa's innovative work in magnetic recording technology has established him as a key figure in the industry. His patents and collaborations continue to influence advancements in this vital area of technology.

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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