Patents by Inventor Kouei Fujiki

Kouei Fujiki 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).

  • Lens barrel part, lens assembly, imaging device, and lens barrel part manufacturing method
    Patent number: 8520330
    Abstract: Provided are a lens barrel part and a method of producing the same, such that the generation of grinding debris due to friction with lenses is suppressed while maintaining the air permeability of porous ceramics. Those areas of a lens barrel part 1 which are in contact with the lenses are ground in the water by a polishing tool 25, with the result that in those regions of surfaces in contact with the lenses where fine projections exist, protection film portions 28 consisting of hydrates or oxides are created due to the generation of tribochemical reactions, and that in those regions of surfaces in contact with the lenses which are other than the regions where fine projections are present, there exist porous portions 29 where no tribochemical reaction occurs and where a porous state remains.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: August 27, 2013
    Assignee: Fujifilm Corporation
    Inventors: Kouei Fujiki, Ryota Sasaki
  • LENS BARREL PART, LENS ASSEMBLY, IMAGING DEVICE, AND LENS BARREL PART MANUFACTURING METHOD
    Publication number: 20130070351
    Abstract: Provided are a lens barrel part and a method of producing the same, such that the generation of grinding debris due to friction with lenses is suppressed while maintaining the air permeability of porous ceramics. Those areas of a lens barrel part 1 which are in contact with the lenses are ground in the water by a polishing tool 25, with the result that in those regions of surfaces in contact with the lenses where fine projections exist, protection film portions 28 consisting of hydrates or oxides are created due to the generation of tribochemical reactions, and that in those regions of surfaces in contact with the lenses which are other than the regions where fine projections are present, there exist porous portions 29 where no tribochemical reaction occurs and where a porous state remains.
    Type: Application
    Filed: May 2, 2011
    Publication date: March 21, 2013
    Applicant: FUJIFILM CORPORATION
    Inventors: Kouei Fujiki, Ryota Sasaki