Patents by Inventor Roger Lagger

Roger Lagger 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).

  • Incremental optical encoder having partially opaqued quadrature detectors
    Patent number: 5763874
    Abstract: An optical encoder having a detector device including four light detectors, each formed of an elongated light sensitive surface. Free zones of this surface alternate with zones covered by an opaque layer arranged so that the cooperation of the light detectors with an encoder disc which leads to the delivery of output signals in phase quadrature, each light detector generating an output signal of a single phase.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: June 9, 1998
    Assignee: PORTESCAP
    Inventors: Antognini Luciano, Christophe Dayer, Roger Lagger