Location History:
- Hitachi, JP (1981 - 1990)
- Tokai, JP (1993)
- Naka, JP (1994)
- Ibaraki-ken, JP (1997)
- Toukai-mura, JP (1997 - 1999)
- Ibaraki, JP (1991 - 2009)
Company Filing History:
10 out of 42,485 
8 out of 1,267 
4 out of 47 
Years Active: 1981-2009
Title: Tsuneaki Kawanishi: Innovator in Electrophotographic Technology
Introduction
Tsuneaki Kawanishi, a prominent inventor based in Ibaraki, Japan, has made significant contributions to the field of electrophotographic technology. With a remarkable portfolio of 24 patents, his work has advanced the way imaging and printing technologies are developed and utilized in various applications.
Latest Patents
Among his latest patents, Kawanishi has developed a device and an electrophotographic apparatus that optimizes the process of toner image formation. This apparatus includes a photoconductor and two developing rollers that feed a specialized developer, consisting of a carrier with specific properties. Notably, the developer features a volume-average particle size smaller than 70 µm and a volume resistivity of at least 10Ω·cm. A crucial aspect of this invention is the defined volume ratio of the carrier within the developing rollers, which ranges from 30% to 46%. Additionally, he has created an electrostatic charge image developing toner that integrates a fixing resin and wax, characterized by distinct thermal properties measured by a differential scanning calorimeter.
Career Highlights
Kawanishi has had a successful career with notable associations at industry leaders such as Hitachi, Ltd. and Hitachi Koki Co., Ltd. His roles in these companies have allowed him to focus on advancing technology and securing numerous patents that enhance printing efficiency and image quality.
Collaborations
Throughout his career, Kawanishi has collaborated with esteemed colleagues, including Ryuuichi Shimizu and Teruaki Mitsuya. Together, they have worked on groundbreaking projects that address the evolving needs of the imaging technology sector, fostering innovation and excellence in their respective fields.
Conclusion
With his extensive experience and a solid foundation in developing advanced electrophotographic technologies, Tsuneaki Kawanishi stands as a key figure in innovation. His contributions continue to influence the industry, paving the way for new advancements that improve imaging processes and technologies in the modern world.
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.