Location History:
- Chiba, JP (1990 - 1997)
- Okayama, JP (1997)
- Kyoto, JP (2000)
Company Filing History:
12 out of 1,256 
2 out of 35 
1 out of 2,630 
Years Active: 1990-2000
Title: The Innovations of Nobuo Totsuka
Introduction
Nobuo Totsuka is a prominent inventor based in Chiba, Japan, known for his significant contributions to the field of materials science. With a total of 12 patents to his name, Totsuka has made remarkable advancements in the development of corrosion-resistant metal sheets.
Latest Patents
Among his latest patents is a zinc and zinc-alloy hot-dip-coated steel sheet that features decreased bare areas. Additionally, he has developed a chromated metal sheet that exhibits high corrosion resistance. This improved version of the chromated metal sheet includes a chromate layer on at least one side of a metal substrate, characterized by a chromium deposit of 10-200 mg/m² per surface in terms of metallic chromium. The chromate layer also contains silica in a weight ratio of SiO₂ to Cr ranging from 0.1 to 6.0. Furthermore, it incorporates lubricating particles such as graphite, MoS₂, BN, calcium stearate, and organic lubricating substances, ensuring sufficient lubricity for press forming without the need for lube oil coatings. This innovation also maintains high electric conductivity, which is essential for spot weldability and groundability, while providing excellent corrosion resistance for use in a naked state.
Career Highlights
Throughout his career, Nobuo Totsuka has worked with notable companies, including Kawasaki Steel Corporation and Furukawa Aluminum Co., Ltd. His work has significantly impacted the manufacturing processes and material properties in the industry.
Collaborations
Totsuka has collaborated with esteemed colleagues such as Takao Kurisu and Katsuhei Kikuchi, contributing to the advancement of innovative materials and technologies.
Conclusion
Nobuo Totsuka's contributions to the field of materials science, particularly in the development of corrosion-resistant metal sheets, highlight his role as a leading inventor. His innovative patents and collaborations have paved the way for advancements in manufacturing and material technology.
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.