Company Filing History:
1 out of 39,245 
1 out of 28 Years Active: 1997
Title: Sonoo Matsuoka: Innovator in Toner Technology
Introduction
Sonoo Matsuoka is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of electrophotography, particularly through his innovative work on toner binders.
Latest Patents
Matsuoka holds a patent for a toner binder, toner, and an electrophotographic method and apparatus. This patent describes a toner binder that comprises a polyester resin with an aliphatic hydrocarbon chain terminated with an ester and/or an ether bond. The resin contains a constituent element consisting of ethylene in an amount of from 1 to 5 wt % based on the total weight of the resin. Additionally, the patent discloses a toner binder that utilizes both a crosslinked polyester with a peak molecular weight of 10,000 or less and a linear polyester with a peak molecular weight of 8,000 or more as binder resins. The peak molecular weight of the linear polyester is greater than that of the crosslinked polyester.
Career Highlights
Throughout his career, Matsuoka has worked with prominent companies such as Fujitsu Corporation and Nippon Carbide Industries Co., Inc. His experience in these organizations has contributed to his expertise in the field of toner technology.
Collaborations
Matsuoka has collaborated with notable individuals in his field, including Yuzo Horikoshi and Norio Sawatari. These collaborations have likely enriched his work and led to further advancements in toner technology.
Conclusion
Sonoo Matsuoka is a distinguished inventor whose work in toner technology has made a lasting impact. His innovative patent and collaborations highlight his contributions to the field of electrophotography.