Patents by Inventor Souji Ohba

Souji Ohba 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).

  • Optical scanning system and image forming apparatus employing same for electrophoto graphically forming images
    Patent number: 5652611
    Abstract: An optical scanning system includes a first lens for receiving a light beam from a light source and allowing the light beam to pass therethrough, and a polygon mirror having at least one reflection surface for deflecting the light beam from the first lens by reflecting the light beam on the reflection surface thereof. A second lens is provided for receiving the light beam from the polygon mirror and focusing the light beam on a first plane to be scanned. The second lens has a first surface facing toward the polygon mirror and a second surface facing toward the first plane.
    Type: Grant
    Filed: March 9, 1994
    Date of Patent: July 29, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hironori Nakashima, Souji Ohba, Manabu Kitajima
  • Step linear actuator
    Patent number: 5091710
    Abstract: A step linear actuator includes a stationary member of a magnetic material, a pair of moving units each being in contact with the stationary member and having a magnetic coupling element for magnetically generating a contact force to the stationary member and an opposing face opposing to the opposing face of the other moving unit through a gap therebetween, and a magnetic driver for generating magnetic forces to control the contract force between each moving unit and the stationary member and to cause a relative movement of the pair of moving units with respect to each other.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: February 25, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Souji Ohba, Ryota Shimizu, Hideki Ohura