Patents by Inventor Takae Ogiwara

Takae Ogiwara 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).

  • Production of colored silk filament
    Patent number: 5538519
    Abstract: Described is a method for producing a colored silk filament by having a colorant solution absorbed through the spiracles of each silkworm larva and then allowing the larva to secrete the colored silk filament through the spinneret thereof. In this method, a solution of a polymer-linked dyestuff is employed as the colorant solution.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: July 23, 1996
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Shigeji Ogiwari
    Inventors: Shojiro Horiguchi, Takae Ogiwara, Yoshio Abe, Akira Hoshino