This inventor holds 6 USPTO granted patents and 1 published patent application. Top assignees: Nittetsu Mining Co., Ltd., Hitachi Powdered Metals Co., Ltd., Dowa Mining Co., Ltd.. Active years: 1982-2004.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Sendai, JP (1982)
- Akita-Shi, Akita, JP (1996 - 2000)
- Akita, JP (1998 - 2004)
Company Filing History:
4 out of 43 
3 out of 149 
1 out of 217 Years Active: 1982-2004
Title: The Innovative Contributions of Toyohisa Fujita
Introduction
Toyohisa Fujita is a notable inventor based in Akita, Japan. He has made significant contributions to the field of technology, particularly in the areas of sulfur recovery and magnetic fluids. With a total of 6 patents to his name, Fujita's work showcases his innovative spirit and dedication to advancing scientific knowledge.
Latest Patents
Fujita's latest patents include a method for recovering sulfur from minerals and other sulfur-containing compounds. This method involves heating a sulfur-rich concentrate obtained from the leaching of zinc concentrate at a temperature not lower than the melting point of sulfur but below its boiling point. The process allows for the condensation of sulfur by cooling the evolving gas containing sulfur vapor.
Another significant patent is for a magnetic fluid and the process for its production. This magnetic fluid is designed to be actuated by an external magnetic field, allowing for precise control of its viscosity. The fluid is characterized by its resistance to oxidation and excellent dispersibility of particles. The production process involves forming an oxide film on magnetic metal particles, which are then reduced and dispersed in a solvent.
Career Highlights
Fujita has worked with Nittetsu Mining Co., Ltd., where he applied his expertise in mineral processing and fluid dynamics. His career reflects a commitment to innovation and the practical application of scientific principles.
Collaborations
Throughout his career, Fujita has collaborated with notable individuals such as Kenji Yoshino and Junzo Shimoiizaka. These collaborations have contributed to the advancement of his research and the successful development of his patents.
Conclusion
Toyohisa Fujita's contributions to the fields of sulfur recovery and magnetic fluids highlight his innovative approach to problem-solving. His patents not only demonstrate his technical expertise but also his commitment to advancing technology for practical applications.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile