Patents by Inventor Misao Shinkawa

Misao Shinkawa 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).

  • Method for manufacturing a telescopic antenna for vehicles
    Patent number: 5638594
    Abstract: A multi-stage telescopic antenna for use in vehicles and a method for manufacturing such an antenna in which the antenna element, which comprises uppermost rod and conductive pipes, is free of any bending or breaking damage even if a large load is applied to the antenna element from a lateral direction, and there is no permanent deformation occurs even after the load is removed, so that the antenna element can always be maintained straight and smooth and stable extension and retraction can be executed.At least the conductive pipes 12 through 14 are formed from a high-elasticity material obtained by heat-treating SUS 631. In the heat treatment, the material is heated at a standard temperature of 480.degree. C..+-.5.degree. C. and then gradually cooled.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: June 17, 1997
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventors: Misao Shinkawa, Misao Kimura