logo

For the Inventor, By the Inventor

Saitama, Japan

Yasushi Kumamaru

This inventor holds 2 USPTO granted patents. Top assignee: Pioneer Corporation. Active years: 2006-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasushi Kumamaru. Retrieved from https://idiyas.com/inventor/yasushi-kumamaru

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

USPTO Granted Patents = 2

Average Co-Inventor Count = 7.0

ph-index = 1

Forward Citations = 1(Granted Patents)


Company Filing History:

goldMedal2 out of 2,679 
 
Pioneer Corporation
 patents

Years Active: 2006-2007

Loading Chart...
2 patents (USPTO):Explore Patents
1. 7170831 - Optical pickup astigmatism measuring method, optical pickup astigmatism adjusting method, and optical pickup astigmatism measuring system (2007-01-30),
2. 7064308 - Method of and apparatus for adjusting the focus position of an optical pickup (2006-06-20),

: The Innovative Contributions of Yasushi Kumamaru</p><p></p><p><b>Introduction</b></p><p>Yasushi Kumamaru is a notable inventor hailing from Saitama-ken, Japan, recognized for his significant contributions to optical technologies. With a total of two patents to his name, Kumamaru has focused on enhancing optical pickup systems, which are crucial in various modern digital applications.</p><p></p><p><b>Latest Patents</b></p><p>His latest patents include methods and systems for measuring and adjusting optical pickup astigmatism. The first patent introduces an optical pickup astigmatism measuring method and system designed to facilitate easy correction of astigmatism, even when the light beam's spot shape converged on an optical disc deviates from a true circular form. By calculating inter-focal distances, Kumamaru's invention enables precise adjustments of a reflection mirror's installation angle, thereby effectively correcting astigmatism.</p><p></p><p>The second patent focuses on the method and apparatus for adjusting the focus position of an optical pickup. This innovation utilizes a brightness measuring apparatus alongside a half mirror and an objective lens to determine optimum focus adjustments. By continuously changing the position of a multi-lens within the optical pickup and measuring the brightness of the resulting spot light image, the invention ensures that the focus position is set for maximum clarity and efficiency.</p><p></p><p><b>Career Highlights</b></p><p>Kumamaru's work with Pioneer Corporation, a leader in the electronic and optical manufacturing sector, has been instrumental in pushing the boundaries of optical technology. His inventive approach has contributed to advancements that optimize performance in the industry.</p><p></p><p><b>Collaborations</b></p><p>During his career, Yasushi has collaborated with skilled colleagues, including Hitoshi Takiguchi and Hidekazu Ouchi. Together, they have worked on furthering innovations that improve the functionality and accuracy of optical systems, showcasing the power of teamwork and shared expertise in the field.</p><p></p><p><b>Conclusion</b></p><p>In summary, Yasushi Kumamaru stands out as an influential inventor whose patents in optical technologies demonstrate the potential for innovation within the industry. His methods for measuring and adjusting optical pickup astigmatism not only highlight his technical expertise but also pave the way for future developments in optical systems. Through collaboration and creativity, Kumamaru continues to make significant contributions to advancements in technology.</p>

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]
Loading…