Patents by Inventor Yutaka Saisho

Yutaka Saisho 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).

  • Composite air-filtering material
    Patent number: 5198294
    Abstract: An air-filtering material exchangeably attached to a home-use or automobile air filter comprises a water jet type nonwoven fabric at an air outlet side and another type nonwoven fabric or fiber assembly at an air inlet side. These nonwoven fabric sheets are laminated on one another by needle punching. The water jet type nonwoven fabric is made from crowded finer fiber staples, and bits formed therein by penetration of needles of a needle punching machine may be stopped up by centripetally moving fiber staples surrounding the bits.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: March 30, 1993
    Assignee: Dynic Corporation
    Inventors: Takuichiro Masuda, Norio Umezu, Yutaka Saisho