Patents by Inventor Yoshifumi Takemura

Yoshifumi Takemura 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).

  • Concrete joint sealant
    Patent number: 4374946
    Abstract: A concrete joint sealant comprising tall pitch, atactic polypropylene, fresh rubber and aliphatic hydrocarbon resin.
    Type: Grant
    Filed: September 22, 1981
    Date of Patent: February 22, 1983
    Assignee: Aoi Chemical Inc.
    Inventors: Yoshifumi Takemura, Hirokazu Miyazaki