Patents by Inventor Natsuki Munekata

Natsuki Munekata 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).

  • Visual acuity examination apparatus
    Patent number: 6663241
    Abstract: A visual acuity examination apparatus is provided with a mark display face which has an outer face on which at least one mark is displayed so as to be viewed and which is formed such that the at least one mark and the periphery thereof are illuminated with a predetermined brightness, and a light shielding face which is disposed in front of the display face to be subjected to high speed movement, which is formed with a slit having a proper width and whose front face is formed so as to be illuminated with the same brightness as that of the mark display face. Accordingly, an accurate display contrast of the mark can be realized with a simple structure and without deterioration with age.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: December 16, 2003
    Assignee: Neitz Instruments Co., Ltd
    Inventors: Sanyo Nagayama, Natsuki Munekata
  • Visual acuity examination apparatus
    Publication number: 20030048414
    Abstract: A visual acuity examination apparatus is provided with a mark display face which has an outer face on which at least one mark is displayed so as to be viewed and which is formed such that the at least one mark and the periphery thereof are illuminated with a predetermined brightness, and a light shielding face which is disposed in front of the display face to be subjected to high speed movement, which is formed with a slit having a proper width and whose front face is formed so as to be illuminated with the same brightness as that of the mark display face. Accordingly, an accurate display contrast of the mark can be realized with a simple structure and without deterioration with age.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 13, 2003
    Applicant: NEITZ INSTRUMENTS CO., LTD
    Inventors: Sanyo Nagayama, Natsuki Munekata