Patents by Inventor Douglas Willard Lindstrom

Douglas Willard Lindstrom 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).

  • Publication number: 20170012571
    Abstract: Briefly, the invention involves a system and method for generating electrical power. The system includes an electromagnet positioned with one pole directed toward a like pole of a permanent magnet. The permanent magnet is preferably mounted for oscillating movement toward the pole of the electromagnet. A control system for the electromagnet is provided to supply direct current (DC) power in the form of square wave pulses which coincide with the position of the permanent magnet. Power is collected upon the collapse of the magnetic field within the electromagnetic magnet. In some embodiments the present device is supplied in the form of a reciprocating engine which provides rotary motion in addition to the electrical power generated.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 12, 2017
    Inventors: Michael Cristoforo, Douglas Willard Lindstrom
  • Publication number: 20040055631
    Abstract: A hybrid solar energy collector has a photovoltaic collector that generates electricity and a thermal collector that generates heat. The photovoltaic collector, which is semi-transparent, utilizes shorter-wavelength radiation while selectively transmitting medium- and long-wavelength radiation to the thermal collector. The collectors are separated by a thermal insulating barrier.
    Type: Application
    Filed: May 28, 2003
    Publication date: March 25, 2004
    Inventors: Kazimierz Szymocha, Douglas Willard Lindstrom, Kristian Peter Olsen