Patents by Inventor Jim Zenji Nishioka

Jim Zenji Nishioka 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).

  • Patent number: 3989026
    Abstract: A pair of oppositely extending bow arms on a main body portion have guides on their tips. A bowstring extending between the tips has end sections movably contacting the guides. The bow has a drawing force produced either by flexible bow arms or a resilient member on the bow, and a second guide is employed to receive the end sections of the bowstring and position them so that they will be acted upon equally by the drawing force while moving in unison with it to provide a balanced bow for accurate shooting of arrows. Control apparatus may be employed to decrease the tension on the bowstring as the latter approaches its fully drawn condition. In bows using flexible bow arms as the drawing force, a cable operatively connects the arms and unites them into common operation.
    Type: Grant
    Filed: April 22, 1974
    Date of Patent: November 2, 1976
    Inventor: Jim Zenji Nishioka