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For the Inventor, By the Inventor

Fujisawa, Japan

Hideaki Takehara

This inventor holds 12 USPTO granted patents. Top assignees: Victor Company of Japan, Limited, Adamant Kogyo Co., Ltd.. Active years: 1982-1992.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hideaki Takehara. Retrieved from https://idiyas.com/inventor/hideaki-takehara-6r3vk12d

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 = 100.0

Average Co-Inventor Count = 1.5

ph-index = 4

Forward Citations = 29(Granted Patents)


Location History:

  • Yokohama, JP (1982 - 1985)
  • Fujisawa, JP (1983 - 1992)

Company Filing History:

goldMedal12 out of 2,887 
 
Victor Company of Japan, Limited
 patents
silverMedal1 out of 35 
 
Adamant Kogyo Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1982-1992

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12 patents (USPTO):Explore Patents
1. 5142513 - Magneto-optical storage medium and magneto-optical overwrite system with (1992-08-25),
2. 4704326 - Tin alloys for recording media (1987-11-03),
3. 4542493 - Pickup stylus having fused diamond and ceramic bodies with conductive (1985-09-17),
4. 4535436 - Stylus having a graphite electrode (1985-08-13),
5. 4503529 - Record stylus for capacitance disks (1985-03-05),
6. 4495610 - Circuit arrangement for applying high frequency energy to a capacitance (1985-01-22),
7. 4488281 - Capacitance detection type record stylus having a conductive shank (1984-12-11),
8. 4480326 - Stylus having a conductive carbon layer (1984-10-30),
9. 4426660 - Stylus for detecting signals recorded as geometric variations and method (1984-01-17),
10. 4420675 - Method for making a stylus having a conductive carbon layer and a stylus (1983-12-13),
11. 4409712 - Method for making a stylus having a graphite electrode (1983-10-18),
12. 4357699 - Capacitance detection type stylus with diamond body and electrode having (1982-11-02),

Title: Innovations of Hideaki Takehara

Introduction

Hideaki Takehara is a prominent inventor based in Fujisawa, Japan. He has made significant contributions to the field of magneto-optical storage technology. With a total of 12 patents to his name, Takehara has established himself as a key figure in the development of advanced storage solutions.

Latest Patents

Among his latest innovations are two notable patents. The first is a magneto-optical storage medium and overwrite system. This system comprises a first magnetic layer, a second magnetic layer, and a third magnetic layer, each made from a rare earth-transition metal alloy. The design includes interface layers that isolate magnetic exchange interactions between the layers. The second magnetic layer is initialized by the magnetization of the third layer at room temperature. Additionally, the first and/or second magnetic layers can be heated by a laser beam for demagnetization and remagnetization. The second layer's demagnetized portion is remagnetized in the opposite direction, while the first layer's demagnetized portion aligns with the second layer's direction.

The second patent involves a tin-lead alloy for recording media. This alloy consists of 30 to 70% by weight of tin, with the remainder being lead. These innovations reflect Takehara's commitment to enhancing data storage technologies.

Career Highlights

Throughout his career, Takehara has worked with notable companies, including Victor Company of Japan, Limited and Adamant Kogyo Co., Ltd. His experience in these organizations has contributed to his expertise in the field of magneto-optical technologies.

Collaborations

Takehara has collaborated with esteemed colleagues such as Yoshiyo Wada and Kunio Goto. These partnerships have fostered innovation and advancement in their shared field of expertise.

Conclusion

Hideaki Takehara's contributions to magneto-optical storage technology are significant and impactful. His innovative patents and collaborations highlight his role as a leading inventor in this specialized area.

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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