Patents by Inventor Yasuo Shigeru

Yasuo Shigeru 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).

  • Fade-in and fade-out device of an automatic servomechanism of diaphragm in a cinecamera
    Patent number: 4124283
    Abstract: A fade-in and fade-out device of an automatic servomechanism for controlling the diaphragm exposure of cinecamera. A differential amplifier having a first input voltage corresponding to the scene light and a second reference input voltage corresponding to the requisite exposure, produces a differential control voltage which is applied to the diaphragm during fade-in or fade-out.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: November 7, 1978
    Assignee: Copal Company Limited
    Inventors: Yasuo Shigeru, Tomio Kurosu