logo

For the Inventor, By the Inventor

Odawara, Japan

Nobutaka Kumada

This inventor holds 2 USPTO granted patents. Top assignee: Nisca Corporation. Active years: 2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobutaka Kumada. Retrieved from https://idiyas.com/inventor/nobutaka-kumada

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

Calculating rank
USPTO Granted Patents = 2

Average Co-Inventor Count = 3.0

ph-index = 2

Forward Citations = 7(Granted Patents)


Company Filing History:

goldMedal2 out of 489 
 
Nisca Corporation
 patents

Years Active: 2005

Loading Chart...
2 patents (USPTO):Explore Patents
1. 6842302 - ND filter, method for producing the ND filter, and aperture device including the ND filter (2005-01-11),
2. 6842301 - ND filter and aperture device including the same (2005-01-11),

Title: Innovations by Nobutaka Kumada in Optical Devices

Introduction

Nobutaka Kumada, an accomplished inventor based in Odawara, Japan, has made significant contributions to the field of optical devices. With two patents to his name, Kumada has demonstrated his ingenuity and expertise in developing advanced technologies that enhance the performance of various optical components.

Latest Patents

Kumada's latest patents focus on innovative designs for neutral density (ND) filters and associated aperture devices. His ND filter consists of a substrate made from a plastic sheet, which is crafted from norbornene resin known for its minimal thermal shrinkage factor, effectively preventing wrinkling. This filter also features a deposited film made from a nickel-chromium alloy, ensuring good oxidation resistance and uniform light transmittance across the visible light spectrum. Additionally, his innovation in production methods allows the film to be deposited at temperatures below the glass transition temperature of the plastic sheet, minimizing deformation due to expansion and contraction.

Career Highlights

Currently, Nobutaka Kumada is affiliated with Nisca Corporation, where he applies his expertise in optical technologies to develop cutting-edge products. His work continues to contribute to advancements in the field, offering valuable solutions for various applications.

Collaborations

Throughout his career, Kumada has collaborated with notable colleagues including Katsura Nakajima and Kazuhiro Fukasawa. Together, they have worked on several projects that leverage their combined expertise to push the boundaries of optical innovation.

Conclusion

Nobutaka Kumada's inventive spirit and dedication to improving optical devices underscore his role as a leading figure in the industry. His patented technologies, particularly in ND filters and aperture devices, reflect his commitment to innovation and his ability to solve complex engineering challenges. As he continues to work with talented professionals, the future holds even more potential for groundbreaking advancements in optical technologies.

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…