Patents by Inventor Toshio Sasakura

Toshio Sasakura 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).

  • Electronic leveling apparatus and method of controlling focusing operation of the electronic leveling apparatus
    Patent number: 6621559
    Abstract: The present invention intends to provide an electronic leveling apparatus or the like in which a pattern image of a staff received on a photoelectric converting unit is converted into an electric signal, a peak of contrast is detected based on the obtained electric signal, and thus focusing control is carried out.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: September 16, 2003
    Inventors: Kaoru Kumagai, Toshio Sasakura