Patents by Inventor Unichi Sato

Unichi Sato 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).

  • Patent number: 5089919
    Abstract: An information signal recording apparatus arranged to form a recording track on a recording medium by recording an information signal on the recording medium, in which the information signal is recorded on the recording medium in such state that a first tracking control signal, for effecting a first tracking operation during reproduction, is superimposed thereon, in the case where a stop of the recording track forming operation is not instructed, and the information signal is recorded on said recording medium in such state that a second tracking control signal, for effecting a second tracking operation during reproduction, is superimposed on the information signal, depending upon a timing when the stop of the recording track forming operation is instructed, whereby a position where the first tracking operation becomes impossible on the way of effecting the first tracking operation during reproduction is detected, so that a position of the step of the recording track forming operation on the recording medium c
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: February 18, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Susumu Kozuki, Kenichi Nagasawa, Hiroo Edakubo, Unichi Sato, Nobutoshi Takayama