Location History:
- Tokyo, JP (2002 - 2020)
- Taito-ku, JP (2021)
Company Filing History:
4 out of 1,736 
3 out of 1,268 
1 out of 8,208 
Years Active: 2002-2021
Title: Koichi Kumai: Innovator in Solid-State Imaging and Metal Foil Technologies
Introduction
Koichi Kumai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of solid-state imaging devices and metal foil technologies. With a total of 7 patents to his name, Kumai's work has had a notable impact on various technological advancements.
Latest Patents
Kumai's latest patents include a solid-state imaging device that features microlenses on a substrate. This innovative device comprises a substrate with a surface, microlenses formed on that surface, and a concave lens positioned between adjacent microlenses, directed toward the substrate's surface. Another significant patent involves a metal foil pattern layered body, which includes a base member and a metal foil with a metal pattern formed by an opening and a metal portion. This invention also features a protuberance at the boundary between the opening and the metal portion.
Career Highlights
Throughout his career, Koichi Kumai has worked with notable companies such as DSM IP Assets B.V. and Toppan Printing Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to the advancement of technology in his field.
Collaborations
Kumai has collaborated with talented individuals, including Ryuji Ueda and Takehito Tsukamoto. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Koichi Kumai's contributions to solid-state imaging and metal foil technologies highlight his role as a leading inventor in Japan. His innovative patents and collaborations continue to influence the technological landscape.