Patents by Inventor Lennart Harry Erik Hoglund

Lennart Harry Erik Hoglund 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).

  • Electric amplifier
    Patent number: 4117418
    Abstract: An electric amplifier useful for instance in simulators for strong electric signals, comprising several partial amplifiers so connected and voltage fed that they will amplify an interval each of the input voltage. Every partial amplifier comprises at least one amplification component and two gates, of which gates one is blocking those potentials applied to the component that are less than a given first value but is open for potentials exceeding said value while the other gate is open for potentials less than a given second value greater than said first value but is blocking the component for potentials exceeding said second value.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: September 26, 1978
    Inventor: Lennart Harry Erik Hoglund
  • Three-phase ring transformer core
    Patent number: D454839
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: March 26, 2002
    Inventor: Lennart Harry Erik Höglund