Patents by Inventor Marc Levain

Marc Levain 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).

  • Adjustment process of an electronic trip device
    Patent number: 5290991
    Abstract: The passive components of the analog channel of the trip device are achieved by serigraphy on a thick layered hybrid circuit. Adjustment, by laser, of the value of an offset voltage compensating resistance and of a measuring resistance enables the offset voltage and gain of the channel to be adjusted with precision.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: March 1, 1994
    Inventors: Marc Levain, Didier Fraisse
  • Electronic trip device with short delay function
    Patent number: 5208720
    Abstract: The short time delay circuit comprises a counter which is zero reset when the signal representative of the current is greater than or equal to a threshold, and controls count-down of an up-down counter, when the content of the counter reaches a preset value. A clock circuit controls the count-up and count-down frequency of the counter and up-down counter.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: May 4, 1993
    Assignee: Merlin Gerin
    Inventors: Didier Fraisse, Marc Levain
  • Microprocessor-based trip device with optional functions and selection process of said functions
    Patent number: 5101316
    Abstract: The optional functions of a microprocessor-based trip device are selected by means of keys of a keypad. the different options are displayed sequentially on a display during running of a selection subroutine contained in a read-only memory (ROM), the keypad enabling the selected option to be stored in an EEPROM memory.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: March 31, 1992
    Assignee: Merlin Gerin
    Inventor: Marc Levain