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For the Inventor, By the Inventor

Kanagawa, Japan

Masakazu Yajima

This inventor holds 51 USPTO granted patents and 17 published patent applications and 11 EPO patents, primarily in Contact Lens Technology. Top assignees: Sony Corporation, Amaterz, Inc., Sony Semiconductor Solutions Corporation. Active years: 2012-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masakazu Yajima. Retrieved from https://idiyas.com/inventor/masakazu-yajima

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

USPTO Granted Patents = 51 

% Patents Active = 80.4

 

Average Co-Inventor Count = 3.7

ph-index = 4

Forward Citations = 63(Granted Patents)

Forward Citations (Not Self Cited) = 46(Dec 10, 2025)


Location History:

  • Tokyo, JP (2018 - 2020)
  • Chiba, JP (2016 - 2022)
  • Kanagawa, JP (2012 - 2024)

Company Filing History:

goldMedal46 out of 58,145 
 
Sony Corporation
 patents
silverMedal3 out of 3 
 
Amaterz, Inc.
 patents
bronzeMedal3 out of 3,298 
 
Sony Semiconductor Solutions Corporation
 patents
4. 1 out of 718 
 
Dexerials Corporation
 patents
5. 1 out of 1,799 
 
Sony Computer Entertainment Inc.
 patents
6. 1 out of 4,241 
 
Sony Group Corporation
 patents
7. 1 out of 3,349 
 
Sony Interactive Entertainment Inc.
 patents
where one patent can have more than one assignee

Years Active: 2012-2026

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Areas of Expertise:
Contact Lens
Communication System
Management Apparatus
Wearable Device
Signal Transmission
Power Feeding
Detection Device
Information Processing
Electronic Apparatus
Livestock Management
Electric Power Generation
Storage Medium
51 patents (USPTO):Explore Patents
1. 12526037 - Relay device (2026-01-13),
2. 12414466 - Communication device and power source device (2025-09-09),
3. 12212143 - Communication terminal device (2025-01-28),
4. 12032229 - Contact lens (2024-07-09),
5. 11589817 - Contact lens and accessory (2023-02-28),
6. 11534065 - Contact lens and communication system (2022-12-27),
7. 11520168 - Contact lens and communication system (2022-12-06),
8. 11510397 - Management apparatus, individual management system, and individual search system (2022-11-29),
9. 11395629 - Detection device for placement in contact with the eye of a user (2022-07-26),
10. 11223390 - Power feeding unit and power feeding system (2022-01-11),
11. 11080882 - Display control device, display control method, and program (2021-08-03),
12. 10955689 - Contact lens and storage medium (2021-03-23),
13. 10923083 - Display control device, display control method, and program (2021-02-16),
14. 10785960 - Information processing server, information processing system, and system processing method (2020-09-29),
15. 10734829 - Electronic apparatus, method of controlling electronic apparatus, power reception device, electric device, and system (2020-08-04),

Title: Masakazu Yajima: Innovator in Contact Lens Technology

Introduction

Masakazu Yajima is a prominent inventor based in Kanagawa, Japan, recognized for his significant contributions to the field of contact lens technology. With an impressive portfolio of 48 patents, Yajima continues to advance the capabilities and functionalities of contact lenses, demonstrating his commitment to innovation in optical devices.

Latest Patents

Yajima's latest patents reflect a strong focus on improving user experience and integrating technology within contact lenses. One of his patents describes a contact lens that includes a lens unit designed to be placed on the eyeball, coupled with an optical device positioned in a circular region opposite the pupil. This device aims to provide a distinctive action to incoming light, enhancing visual performance.

Another noteworthy invention involves a contact lens featuring an acquisition section capable of gathering biological information. This lens can communicate the acquired biological data to an external apparatus worn on the human body. It includes innovative components like coil antennas and capacitors, signifying a leap towards smart wearable technology in personal health monitoring.

Career Highlights

Masakazu Yajima has had a distinguished career, primarily associated with renowned companies such as Sony Corporation and Sony Semiconductor Solutions Corporation. His work at these institutions has fostered an environment of creativity and technological advancement, allowing him to push the boundaries of conventional contact lenses.

Collaborations

Throughout his career, Yajima has collaborated with esteemed professionals in the field, including Takayuki Hirabayashi and Hideo Niikura. These collaborations have contributed to the innovative spirit that characterizes his work and have resulted in a multitude of patented inventions that continue to shape the future of optics.

Conclusion

Masakazu Yajima stands as a significant figure in the realm of contact lens innovation. His dedication to enhancing optical devices through technology demonstrates not only his expertise as an inventor but also his vision for the future of personal eye care. With ongoing advancements and a strong patent portfolio, Yajima's contributions will likely continue to influence the field for years to come.

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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