Patents by Inventor Ichiroh Saitoh

Ichiroh Saitoh 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).

  • Super-wide angle lens
    Patent number: 8134787
    Abstract: A super wide angle lens is a super wide angle lens which is of high-resolution and whose size, weight and cost can be reduced. It employs a four-group five-element constitution in which in the order from an object side, a meniscus single lens having a negative power, a single lens having a negative power, a single lens having a positive power, and a cemented lens having a positive power are included. The lenses excluding the meniscus single lens are plastic lenses and seven lens surfaces, that are a third surface, a fourth surface, a fifth surface, a sixth surface, a eighth surface, a ninth surface and a tenth surface, are aspheric.
    Type: Grant
    Filed: September 7, 2008
    Date of Patent: March 13, 2012
    Assignee: Nidec Nissin Corporation
    Inventor: Ichiroh Saitoh
  • SUPER-WIDE ANGLE LENS
    Publication number: 20100188757
    Abstract: A super wide angle lens is a super wide angle lens which is of high-resolution and whose size, weight and cost can be reduced. It employs a four-group five-element constitution in which in the order from an object side, a meniscus single lens having a negative power, a single lens having a negative power, a single lens having a positive power, and a cemented lens having a positive power are included. The lenses excluding the meniscus single lens are plastic lenses and seven lens surfaces, that are a third surface, a fourth surface, a fifth surface, a sixth surface, a eighth surface, a ninth surface and a tenth surface, are aspheric.
    Type: Application
    Filed: September 7, 2008
    Publication date: July 29, 2010
    Applicant: NIDEC NISSIN CORPORATION
    Inventor: Ichiroh Saitoh
  • Magnetic recording disk in which the level of the surface of the data tracks, and servo tracks is higher than that of the guardbands
    Patent number: 5138511
    Abstract: A magnetic recording disk in which the level of the surface of the data tracks and servo tracks is higher than that of the guardbands.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: August 11, 1992
    Assignee: Sony Corporation
    Inventors: Susumu Hoshimi, Ichiroh Saitoh