This inventor holds 51 USPTO granted patents, primarily in Electrophotographic Toner (CPC class 422 ). Top assignees: Konishiroku Photo Industry Co., Ltd., Konica Minolta Business Technologies, Inc., Kabushiki Kaisha Toshiba. Active years: 1979-2012.
Inventors with similar research interests:
Location History:
- Tokorozawa, JP (1979)
- Tokorosawa, JP (1980 - 1990)
- Yokohama, JP (1986 - 1992)
- Kawasaki, JP (1993 - 1997)
- Hino, JP (1980 - 2002)
- Kunitachi, JP (2008 - 2011)
- Tokyo, JP (1992 - 2012)
Company Filing History:
18 out of 1,252 
11 out of 2,526 
9 out of 53,250 
Years Active: 1979-2012
Areas of Expertise:
Title: **Mikio Koyama: Innovator in Toner Technology**
Introduction
Mikio Koyama, a prolific inventor based in Kunitachi, Japan, is renowned for his contributions to the field of electrophotographic toner technology. With an impressive portfolio of 51 patents, Koyama has significantly advanced the reproducibility and stability of color toners in printing applications.
Latest Patents
Among his latest innovations, Koyama has developed a toner designed to improve color reproducibility and density stability. This specific toner includes a resin and a colorant, featuring compounds represented by general formula (1) and (2). Each compound has its unique composition, wherein general formula (1) highlights various potential substituents such as hydrogen atoms, halogen atoms, and alkyl groups, emphasizing the presence of chlorine atoms. Meanwhile, general formula (2) details a range of hydrogen and alkyl group configurations as well. Furthermore, Koyama's innovation extends to the manufacturing method of electrophotographic toners, which provides a systematic approach to produce high-quality toner products.
Career Highlights
Throughout his career, Koyama has been associated with notable companies in the imaging and printing industry, including Konishiroku Photo Industry Co., Ltd. and Konica Minolta Business Technologies, Inc. His tenure at these organizations has allowed him to make significant strides in imaging technology and toner development.
Collaborations
Koyama has worked alongside distinguished colleagues such as Kenji Hayashi and Kenichiro Okaniwa. Their collaborations have fostered innovation and have enabled the development of cutting-edge technologies that enhance the efficiency and quality of printing solutions.
Conclusion
Mikio Koyama’s contributions to toner technology have played a crucial role in advancing the capabilities of printing systems. His extensive patent portfolio reflects his commitment to innovation and excellence, ensuring that the field of electrophotographic toners continues to evolve and meet the demands of modern printing technology.