Patents by Inventor Yoshihisa Tsujimura

Yoshihisa Tsujimura 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).

  • Water purifier
    Patent number: 5071551
    Abstract: A water purifier comprising a primary filter for removing residual chlorine and other impurities, a secondary filter disposed downstream of the primary filter for removing microorganisms and antimicrobial means disposed between the primary filter and the secondary filter. The water purifier of the invention can be used for long time since the proliferation of microorganism, which causes clogging of the secondary filter, is effectively prevented.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: December 10, 1991
    Assignee: Kabushiki Kaisha Aiaishi
    Inventors: Yasuyuki Muramatsu, Yoshihisa Tsujimura