Company Filing History:
3 out of 11,665 
1 out of 16,458 
Years Active: 1983-1989
Title: Innovator Spotlight: Yoshimi Amagai - A Pioneer in Electrophotographic Development
Introduction: Yoshimi Amagai, a renowned inventor based in Kanagawa, Japan, has made significant contributions to the field of electrophotography. With a total of four patents to her name, Amagai's work focuses on advanced developments in toner technology that enhance image quality and processing efficiency.
Latest Patents: Among Yoshimi Amagai's latest patents, two key innovations stand out. The first is a two-component electrophotographic developer that includes a positive charging toner and a negative charging carrier composed of dispersed magnetic powder. This innovative system features a hydrophilic alumina particle adhered to the surface of the positive charging toner, and the negative charging carrier has a volume average particle diameter ranging from 30 to 80 micrometers. This developer effectively reduces toner cloud during processing and produces toner images free from fog. The second patent is for a dry electrophotographic toner comprising a graft copolymer. This toner is formulated for electrostatic latent image development, utilizing a resin binder that contains polyester with carboxyl (--COOH) groups. Notably, some of these carboxyl groups are replaced with nitrogen-containing compounds like amines, ammonium salts, and betaines, which enhances the toner’s performance in developing negatively charged latent images and ensures good low-temperature fixability.
Career Highlights: Yoshimi Amagai has achieved considerable success throughout her career, notably with her tenure at Fuji Xerox Co., Ltd. and Fuji Photo Film Company, Limited. Her work at these leading companies has allowed her to push the boundaries of imaging technology and contribute to the advancement of electrophotographic systems.
Collaborations: In her journey as an inventor, Yoshimi Amagai collaborated with esteemed colleagues, including Shigeo Aonuma and Koichi Tanaka. These collaborations have facilitated knowledge exchange and innovation, reinforcing her reputation in the field.
Conclusion: Yoshimi Amagai exemplifies the spirit of innovation with her remarkable contributions to electrophotographic technology. Her patents not only showcase her technical acumen but also highlight her dedication to improving image quality and processing efficiency in the industry. As technologies continue to evolve, her inventions will undoubtedly pave the way for future advancements in the field.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.