Patents by Inventor Tadahiko Matsuoka

Tadahiko Matsuoka 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).

  • Process for preparation of granular .mu.-sulfur having improved flowability, as a vulcanizing agent of rubber composition
    Patent number: 5290321
    Abstract: An organic solvent alone or together with a rubber process oil is added to a powder of .mu.-sulfur, the mixture is granulated, and the granulation product is heated at a temperature lower than 120.degree. C. to evaporate the organic solvent, whereby granular .mu.-sulfur having an improved flowability is obtained. This granular .mu.-sulfur is valuable as a rubber-vulcanizing agent.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: March 1, 1994
    Assignee: Shikoku Chemicals Corporation
    Inventors: Yukihiro Koga, Tadahiko Matsuoka, Masatoshi Sasa
  • Rotary telephone dial
    Patent number: 4144413
    Abstract: A rotary telephone dial, in which at least one shaft is fixedly planted on a base plate. A rotary member is rotatably mounted on the shaft. Another base plate is engaged with the free end of the shaft to support the shaft. One direction assembling can be performed as a result of the above structure. A finger moving compensation mechanism is provided to obtain a sufficent allowable range of finger moving. The spring retaining structure and the governor mechanism are improved to effectively reduce the number of parts and to realize simplification of the manufacturing process.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: March 13, 1979
    Assignees: Iwasaki Tsushinki Kabushiki Kaisha, Nippon Telegraph and Telephone Public Corporation
    Inventors: Tadashi Kodama, Masayuki Murakami, Tsuneji Kimeda, Tadahiko Matsuoka, Osamu Hara, Satoru Tsukiyama