Patents by Inventor Daniel Dutertre-Laduree

Daniel Dutertre-Laduree 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).

  • High-tension generator circuit with very low current consumption
    Patent number: 4855889
    Abstract: High-tension generator circuit for a particle detector, having a transformer (8, 9) and a voltage step-up circuit (10). The primary 8 of the transformer is fed by means of a power transistor 7 whose drive transistor 6 is controlled by means of a resistance-capacitance circuit (4, 5). In each conduction period of the primary the secondary brings about a reversal of the polarity of the capacitance.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: August 8, 1989
    Assignee: Professional General Electronic Products
    Inventors: Michele Blanchot, Daniel Dutertre-Laduree, Rein A. Roos
  • Electric particle detector for the detection of fire
    Patent number: 4698586
    Abstract: The sensor 1 has its point of operation towards the Townsend discharge zone, and the collection of ions causes an increase in the current passing through it. The electrodes of the sensor are formed by wires bent in the shape of an alpha.
    Type: Grant
    Filed: November 22, 1985
    Date of Patent: October 6, 1987
    Assignee: PGEP Professional General Electric Corp.
    Inventors: Andre Roos, Daniel Dutertre-Laduree, Max Goldman, Alice Goldman