Patents by Inventor Edward J. Johnston

Edward J. Johnston 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).

  • Reversible electrodeposition switching device
    Patent number: 4473806
    Abstract: A cell changes conductivity by electrodeposition of a metal in response to an applied voltage pulse. The cell can be used as a variable resistance device to provide a broad frequency switching or modulating device that operates to switch dc as well as microwave energy. The cell also functions as a variable reactance device.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: September 25, 1984
    Inventor: Edward J. Johnston
  • Automatic feed control system
    Patent number: T988005
    Abstract: An automatic feed control system for a forage blower of the type adapted to be fed by a forage unloading wagon including a pressure switch connected to the blower discharge pipe, a device for controlling the discharge rate of the wagon to the blower, and electrical circuitry connecting the switch and control device so that when pressure in the discharge pipe exceeds a given level, the pressure switch actuates the control device to reduce the feed rate of the crops to the blower from the wagon.
    Type: Grant
    Filed: October 5, 1978
    Date of Patent: November 6, 1979
    Assignee: International Harvester Company
    Inventors: N. Donald Patterson, Anthony J. Falanga, Edward J. Johnston, Thomas J. Scarnato