Location History:
- Takasaki, JA (1976)
- Takasaki, JP (1979 - 1983)
- Gunma, JP (1985 - 1989)
- Maebashi, JP (1990 - 1991)
Company Filing History:
15 out of 321 
2 out of 356 
2 out of 18 
Years Active: 1976-1991
Title: **The Innovations of Minoru Kumakura: Pioneering Advances in Contact Lens Technology**
Introduction
Minoru Kumakura, an accomplished inventor based in Takasaki, Japan, has made significant contributions to the fields of optics and electrophotography. With a portfolio of 15 patents, his innovations focus on improving the performance and comfort of contact lenses and electrophotographic photoreceptors.
Latest Patents
Kumakura's most recent innovations include a groundbreaking patent for a porous contact lens and a method for making it. This invention aims to produce hard and soft contact lenses with optimal pore diameters and densities, enhancing their oxygen permeability. The process involves molding the contact lens and irradiating it with a polyvalent heavy ion beam, followed by ultrasonic etching. This technique provides better comfort and usability for wearers.
Another notable patent concerns an electrophotographic photoreceptor featuring silicate with perfluoroalkyl. This technology incorporates a photoconductive layer with a protective layer formed through the dehydrocondensation of a hydrolyzate of a perfluoroalkyl silane coupling agent. This photoreceptor stands out for its high performance in elevated temperatures and humidity, offering enhanced abrasion resistance and preserving image quality over extensive use.
Career Highlights
Throughout his career, Kumakura has been associated with reputable institutions such as the Japan Atomic Energy Research Institute and Shindengen Electric Manufacturing Company. His work in these organizations has forged a path for several technological advancements in the industry.
Collaborations
Kumakura has collaborated with notable peers, including Isao Kaetsu and Masaru Yoshida. These collaborations have enriched his research and development efforts, leading to significant strides in innovative technologies.
Conclusion
Minoru Kumakura's extensive work and numerous patents reflect his dedication to innovation in optics and electrophotography. His contributions not only enhance the comfort and effectiveness of optical devices but also pave the way for future advancements in these essential technologies.