Patents by Inventor Hendrikus J. van Esch

Hendrikus J. van Esch 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: 4516019
    Abstract: A light detector circuit is described in which the baseline level of the output signal of a light detector is stabilized by feeding back a control signal to an element that has a voltage variable resistance and is connected in series with the light detector across a voltage source. Several embodiments are shown. In one embodiment a differential amplifier circuit with an integrating feedback circuit is employed to establish a stabilized control voltage.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: May 7, 1985
    Assignee: Oce-Nederland B.V.
    Inventors: Bastiaan B. B. Eertink, Hendrikus J. van Esch