Location History:
- Shizuoka-ken, JP (1999 - 2003)
- Shizuoka, JP (2002 - 2013)
- Numazu, JP (2016)
Company Filing History:
6 out of 28,577 
1 out of 26 
2 out of 832,880 Years Active: 1999-2016
Title: Hachiroh Tosaka: Innovator in Toner Technology
Introduction
Hachiroh Tosaka is a prominent inventor based in Shizuoka, Japan. He has made significant contributions to the field of toner technology, holding a total of 8 patents. His innovative work has had a lasting impact on the imaging industry.
Latest Patents
One of Hachiroh Tosaka's latest patents involves a toner and an image forming method, as well as a process cartridge using the toner. This toner includes toner particles A, which have a circularity greater than 0.93 and not greater than 1.00, and toner particles B, which have a circularity ranging from 0.85 to 0.93. The patent specifies that certain relationships must be satisfied, including 70 ≤ R ≤ 95, 5 ≤ R ≤ 30, 0.014 ≤ SD ≤ 0.025, and 0.940 ≤ ED ≤ 0.950. Here, R(% by number) represents the ratio of toner particles A to the total number of toner particles, while SD denotes the standard deviation of circularity of toner particles A, and ED indicates the average envelope degree of toner particles B.
Career Highlights
Throughout his career, Hachiroh Tosaka has worked with notable companies, including Ricoh Company, Ltd. His expertise in toner technology has positioned him as a key figure in the development of advanced imaging solutions.
Collaborations
Hachiroh Tosaka has collaborated with esteemed colleagues such as Hiroshi Yamashita and Osamu Uchinokura. These partnerships have further enhanced his contributions to the field.
Conclusion
Hachiroh Tosaka's innovative work in toner technology and his numerous patents reflect his dedication to advancing imaging solutions. His contributions continue to influence the industry and inspire future innovations.