Patents by Inventor Nagamitsu Toshiaki

Nagamitsu Toshiaki 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).

  • Tricycle
    Patent number: 3938609
    Abstract: A tricycle having a front and a rear frame swingingly connected with each other in an axis line longitudinal of a tricycle body and providing between both frames an elastic member serving to restore the front frame when it is leaned against the rear frame, which is adapted to make zero or minimum the increasing ratio of restoring force of the elastic member when the front frame is leaned under the predetermined angle of inclination, while, large when over the same angle, whereby the tricycle is made safe and improved in a turning efficiency.
    Type: Grant
    Filed: January 17, 1975
    Date of Patent: February 17, 1976
    Assignee: Daihatsu Motor Company Limited
    Inventors: Yano Kensaku, Kurose Makoto, Nagamitsu Toshiaki