1
David G Bird: Location of missing vehicles. Trimble Navigation, John Schipper, May 23, 1995: US05418537 (404 worldwide citation)

Method and apparatus for determining the present location of a missing vehicle, such as an automobile or marine vessel, using a Global Positioning System that receives GPS signals from two or more GPS satellites. A GPS antenna, GPS signal receiver/processor, a paging responder, a cellular telephone ...


2
DOWNED AIRCRAFT LOCATION SYSTEM AND METHOD. March 22, 2018: US20180079524-A1

An EM emitter includes at least three orthogonal coils driven by an oscillating voltage source, with the coils being electrically in parallel or series. When used in a vehicle, particularly an airplane, and the vehicle is lost, e.g., sinks, the emitter's EM signal passes through water with little at ...


3
Downed Aircraft Location System and Method. The Bedard Family Trust, April 4, 2019: US20190100328-A1

An EM emitter includes at least three orthogonal coils driven by an oscillating voltage source, with the coils being electrically in parallel or series. When used in a vehicle, particularly an airplane, and the vehicle is lost, e.g., sinks, the emitter's EM signal passes through water with little at ...