Fumitomo Yamasaki

This inventor holds 75 USPTO granted patents and 4 published patent applications and 1 EPO patent, primarily in Optical Technology (CPC class G11B). Top assignees: Panasonic Corporation, Matsushita Electric Industrial Co., Ltd., Panasonic Intellectual Property Management Co., Ltd.. Active years: 2005-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Fumitomo Yamasaki. Retrieved from https://idiyas.com/inventor/fumitomo-yamasaki

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

USPTO Granted Patents = 75 (Patent Applications = 4)

% Patents Active = 49.3

EPO Patents = 1 (Patent Applications = 5)

Average Co-Inventor Count = 3.6

ph-index = 4

Forward Citations = 92(Granted Patents)

Forward Citations (Not Self Cited) = 85(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

59 out of 16,454

Panasonic Corporation

patents

10 out of 27,375

Matsushita Electric Industrial Co., Ltd.

patents

6 out of 13,338

Panasonic Intellectual Property Management Co., Ltd.

patents

Years Active: 2005-2019

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Areas of Expertise:

Optical Pickup

Objective Lens

Optical Disc Drive

Information Processing Device

Recording Apparatus

Optical Element

Diffraction Device

Information Recording Medium

Optical Head

Optical Disc Player

Optical Information Device

Thermosensitive Recording Printer

75 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10283157 - Optical pickup (2019-05-07),

2. 9508379 - Recording apparatus (2016-11-29),

3. 9484054 - Optical disc information device and information processing device (2016-11-01),

4. 9418695 - Optical information apparatus and information processing apparatus (2016-08-16),

5. 8995246 - Optical head, objective lens, optical disc device, computer, optical disc player, and optical disc recorder (2015-03-31),

6. 8953428 - Objective lens, optical head, optical disk device, and information processing device (2015-02-10),

7. 8848501 - Detection lens, lens unit, optical pickup device, optical disc device, computer, optical disc player and optical disc recorder (2014-09-30),

8. 8797834 - Objective lens, optical head, optical disk device, and information processing device (2014-08-05),

9. 8767518 - Objective lens element and optical pickup device (2014-07-01),

10. 8755259 - Optical element (2014-06-17),

11. 8681593 - Objective lens, optical head and optical disk device (2014-03-25),

12. 8681592 - Objective lens element and optical head device including the same (2014-03-25),

13. 8531926 - Optical system for optical pickup (2013-09-10),

14. 8493824 - Optical head and optical disc device (2013-07-23),

15. 8483023 - Optical head, diffraction device, objective lens, and optical disc apparatus (2013-07-09),

Title: Innovations and Contributions of Fumitomo Yamasaki

Introduction

Fumitomo Yamasaki, a distinguished inventor based in Nara, Japan, has made significant strides in the field of optical technology. With an impressive portfolio of 75 patents, Yamasaki has demonstrated his creativity and technical prowess, paving the way for advancements in various optical devices.

Latest Patents

Among his latest contributions, Yamasaki developed an **Optical Pickup**, which features an optical base mounted with optical elements, a light source, and a tilt spacer that enhances the characteristics of the light entering the optical base. This innovative design allows the optical base and light source to be fixed directly together, improving functionality and efficiency.

Another notable invention is his **Recording Apparatus**, which incorporates a light source, objective lens, beam splitter, optical element, detector, and operation circuit. This device cleverly divides a light beam into multiple regions, generating a main signal and a secondary main signal through a calculated operation, showcasing Yamasaki's engineering brilliance.

Career Highlights

Fumitomo Yamasaki has worked with prestigious companies, including Panasonic Corporation and Matsushita Electric Industrial Co., Ltd. Throughout his career, he has been at the forefront of cutting-edge technology development, contributing significantly to the research and application of optical systems.

Collaborations

Yamasaki's work has not been in isolation; he has collaborated with talented individuals such as Yoshiaki Komma and Toshiyasu Tanaka. Together, they have synergized their expertise, leading to innovative solutions that have further pushed the boundaries of optical technology.

Conclusion

Through his numerous patents and collaborative efforts, Fumitomo Yamasaki continues to influence the field of optical technology. His dedication and innovative spirit make him an outstanding figure in his field, inspiring future generations of inventors and engineers.

Profile summary based on public USPTO records.