Patents by Inventor Carl Johan Gurbbström

Carl Johan Gurbbström 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).

  • Determination of starting time for flash emitted from flash tube
    Patent number: 10674575
    Abstract: The invention discloses a method for determining a starting time for a flash emitted from a flash tube of a flash apparatus. The flash apparatus comprises a triggering circuit, and a drive circuit. The method comprises the steps of measuring an electric current through and/or a voltage across an electrical component of the drive circuit, and determining the starting time for the flash based on the measured electric current and/or voltage.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: June 2, 2020
    Assignee: PROFOTO AB
    Inventors: Johnny Svensson, Carl Johan Gurbbström