Patents by Inventor Coro Yamauchi

Coro Yamauchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4279649
    Abstract: An electrical contact material and method of producing the same are provided. The material is an internally oxidized silver eutectic alloy system with a main component of silver to which at least one of silicon and germanium is added and, for characteristic improvement purpose, at least one selected from at least one of the groups consisting respectively of gold, platinum and the like, titanium, rhenium and the like, and iron, cobalt and the like is further added. In producing the material, an ingot of said alloy is hot-worked and then internally oxidized at a temperature in a range from 250.degree. C. to the eutectic temperature of the alloy.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: July 21, 1981
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Koichi Fujiwara, Coro Yamauchi, Kishio Arita, Shigeyuki Tsurumi