US 7034695 B2 A collar to be worn on an object or a large or
small animal has been designed incorporating (D)GPS technology.
The operation of the device includes programming the three
dimensional boundary into the memory of the device and simply
installing the collar on the animal. As the animal approaches
the preprogrammed boundary, a first alarm sounds when the
subject is within an arbitrary user defined distance, and a
second more drastic alarm such as a shock correction is applied
when the subject approaches a second position closer to the
boundary. Means to easily program the device are also included
in the system. The device has the capability to call or transmit
important information such as location, speed, identity, and
medical parameters etc to a station automatically or when
polled. All necessary analog and digital circuitry,
microprocessor, programming, communications hardware are
integrated into the collar. The device also has applications in
land, air and sea navigation, farming, construction, t