Patents by Inventor Kurt Ikrath

Kurt Ikrath 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).

  • Method of and apparatus for transmitting clandestine radio signals
    Patent number: 4170757
    Abstract: Clandestine signals are transmitted by using a surface wave acoustic device to disperse the spectrum of a pulse-modulated CW carrier. The dispersed signal is itself modulated and then transmitted to a remote location, at low level. At the remote location, an acoustic device of conjugate characteristics is used to recover the dispersed signal from out of the background noise.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: October 9, 1979
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William J. Skudera, Charles M. De Santis, Kurt Ikrath, deceased
  • Camouflaged dual-slot antenna
    Patent number: 4101896
    Abstract: A low profile camouflaged antenna for military vehicles and the like. The tenna comprises an elongated, typically rectangular, sheet of metal curved to conform to the curvature of the vehicle. Insulated spacers, for example of plastic or fiberglass, maintain a fixed spacing between the metal plate and the vehicle, thus forming two elongated slots which, when suitably energized, act as a dual-slot antenna.
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: July 18, 1978
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Kurt Ikrath, deceased, Paul Sexton, Peter Pingitore, William Kennebeck
  • Camouflage VHF antenna
    Patent number: 4023179
    Abstract: A camouflaged VHF military antenna is formed from the slot which is created hen the door of a pick-up truck having a metal shelter thereon is left partially ajar.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: May 10, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Kurt Ikrath, William Kennebeck, Edward C. Shaffer
  • Rifle barrel serving as radio antenna
    Patent number: 4008478
    Abstract: A toroidal coil mounted around the barrel of a rifle permits the rifle to t as a camouflaged antenna for a VHF transceiver.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: February 15, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Kurt Ikrath, William Kennebeck, Jack Wills
  • Camouflaged VHF antenna
    Patent number: 4005429
    Abstract: A camouflaged VHF antenna for military vehicles. A false roof is fitted to he roof of the vehicle's metal shelter. The false roof includes a U-shaped slot which is parallel to the left and right edges and the rear edge of the vehicle roof. The slot is fed at the center of the U and tuning circuits are connected to the left and right edges of the slot.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: January 25, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Kurt Ikrath, William Kennebeck, Edward C. Shaffer, Peter J. Pingitore
  • Radio frequency interference (RFI) testing by the dual screen room technique
    Patent number: 4004227
    Abstract: The RFI generated by a piece of electrical or electronic equipment is meaed by placing the equipment within a screened test room. A pick-up antenna within the room generates a signal which, after filtering and amplification, drives a reference antenna in a second screened room which is identical to the first. A second pick-up antenna in the first room and a corresponding antenna in the second room are connected to a comparator which compares the RF field intensity in both rooms.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: January 18, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Kurt Ikrath
  • Seismic surveillance system
    Patent number: 3940733
    Abstract: A seismic surveillance system for detecting intruders, and the like. A seic transmitter coupled to the trunk of a tree establishes a seismic field in the earth via the roots of the tree. A seismic receiver similarly coupled to another tree detects the field and the presence of an intruder on the earth in which the field is established is detected by noting changes in the phase, amplitude, or frequency of the seismic field.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: February 24, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ronald F. Johnson, Kurt Ikrath