Patents by Inventor Koki Tsujimoto

Koki Tsujimoto 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).

  • Surveying instrument, target for surveying and surveying system
    Publication number: 20040233415
    Abstract: A target for surveying includes: a reference point and at least one first light emitting body disposed on a vertical line passing through the reference point; and at least one second light emitting body disposed on a horizontal line passing through the reference point and achieving light emitting characteristics different from the light emitting characteristics of the first light emitting body.
    Type: Application
    Filed: December 29, 2003
    Publication date: November 25, 2004
    Applicants: NIKON-TRIMBLE CO., LTD., NIKON CORPORATION
    Inventors: Masahiro Nakamura, Koki Tsujimoto
  • Light wave distance measuring apparatus
    Patent number: 5400130
    Abstract: A light wave distance measuring apparatus structured such that frequency dividing circuits create a base intermediate frequency outputted to a phase measuring circuit and a PLL reference frequency which is a multiple of an integer a (a.gtoreq.2) of the base intermediate frequency, and this PLL reference frequency is outputted to a PLL oscillation circuit, thereby preventing an error in the measurement of distance due to spurious components caused when measuring a phase in the light wave distance measurement.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: March 21, 1995
    Assignee: Nikon Corporation
    Inventors: Koki Tsujimoto, Shigeru Aoki