Patents by Inventor Yoshimi Yazaki

Yoshimi Yazaki 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).

  • Resin coated steel pipe and the process and equipment for its production
    Patent number: 3941087
    Abstract: A resin coated steel pipe is produced by forming the pipe from a band using forming rollers, welding the seam, inserting a paint sprayer which coats an anti-corrosive coating on the inside wall of the pipe, applying an adhesive on the outer surface of the pipe, and applying a layer of the synthetic resin over the adhesive layer. The paint sprayer includes a gun-pipe which protrudes through a stack of ferromagnetic cores, which cores are water-cooled and are used for welding the seam.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: March 2, 1976
    Inventor: Yoshimi Yazaki