Company Filing History:
5 out of 42,485 
3 out of 1,641 
2 out of 1,267 Years Active: 1983-1993
Title: Shigeharu Onuma: Innovator in Electrophotographic Technology
Introduction
Shigeharu Onuma is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of electrophotographic technology, holding a total of 5 patents. His work focuses on enhancing the performance and durability of electrophotographic elements used in devices such as photocopiers and laser printers.
Latest Patents
Onuma's latest patents include innovative designs for electrophotographic photosensitive elements. One of his patents describes an electrophotographic photosensitive element that comprises a protective layer. This element features a substrate and multiple layers, including a photoconductive layer of a-Si:H and an outermost protective and lubricating layer. The protective layer is designed to provide wear resistance and a long lifetime, utilizing a microporous solid material with a hydrophobic lubricant. Another patent details an electrophotographic member that includes a support, a photoconductive layer, and a surface layer with a lubricating agent. This design enhances moisture resistance, wear resistance, and cleaning properties, making it suitable for long-lasting electrophotographic apparatuses.
Career Highlights
Shigeharu Onuma has worked with prominent companies such as Hitachi, Ltd. and Hitachi Chemical Company, Ltd. His experience in these organizations has allowed him to develop and refine his innovative technologies in electrophotography.
Collaborations
Throughout his career, Onuma has collaborated with talented individuals, including Kunihiro Tamahashi and Fuminori Ishikawa. These collaborations have contributed to the advancement of his research and the successful development of his patents.
Conclusion
Shigeharu Onuma's contributions to electrophotographic technology have significantly impacted the industry. His innovative patents and collaborations reflect his dedication to enhancing the performance and reliability of electrophotographic devices.
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.