Location History:
- Kyoto, JP (1990)
- Nagaokakyo, JP (1989 - 1992)
Company Filing History:
6 out of 21,351 
2 out of 197 Years Active: 1989-1992
Title: Hisao Nakanishi: Innovator in Cathode Technology
Introduction
Hisao Nakanishi is a prominent inventor based in Nagaokakyo, Japan. He has made significant contributions to the field of electron tubes, particularly in the development of cathodes. With a total of 6 patents to his name, Nakanishi's work has had a lasting impact on the technology used in various electronic devices.
Latest Patents
Nakanishi's latest patents include innovative designs for cathodes in cathode ray tubes. One of his notable inventions is a cathode that utilizes a base metal primarily composed of nickel, featuring a porous electron emissive layer. This layer is made from a composition that includes 0.1 to 20 wt % of scandium oxide with a layered crystalline structure, mixed with an oxide of alkaline earth metal, including barium. The manufacturing process involves creating a solution with nitrocellulose, mixing in barium carbonate and scandium oxide, and depositing the suspension onto the base metal. Another significant patent involves an electron tube cathode that features a metal layer of no more than 2.0 µm thick, formed on a nickel-based base. This layer is enhanced with a reducing agent and undergoes heat treatment in a hydrogen atmosphere, significantly improving the cathode's life characteristics during high current density operations.
Career Highlights
Throughout his career, Nakanishi has worked with notable companies, including Mitsubishi Electric Corporation and Mitsubishi Materials Corporation. His experience in these organizations has allowed him to refine his expertise in cathode technology and contribute to advancements in the field.
Collaborations
Nakanishi has collaborated with esteemed colleagues such as Masato Saito and Keiji Fukuyama. Their combined efforts have led to innovative solutions and improvements in cathode technology.
Conclusion
Hisao Nakanishi's contributions to the field of electron tubes and cathode technology are noteworthy. His innovative patents and collaborations have significantly advanced the industry, showcasing his expertise and dedication to innovation.