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  2. Invisible Fence Inc. - Wikipedia

    en.wikipedia.org/wiki/Invisible_Fence_Inc.

    Invisible Fence Inc. (commonly referred to as Invisible Fence Brand) is a company that designs radio pet fences for cats and dogs. Manufactured and distributed by Radio System Corporation, the company sells wireless and fenceless systems that were first introduced in 1973. [ 1 ]

  3. Pet fence - Wikipedia

    en.wikipedia.org/wiki/Pet_fence

    A pet fence or radio fence, is an electronic system designed to keep a pet or other domestic animal within a set of predefined boundaries without the use of a physical barrier. A mild electric shock is delivered by an electronic collar if its warning sound is ignored. The system was first invented and patented by Richard Peck in 1973. [1]

  4. Electric fence - Wikipedia

    en.wikipedia.org/wiki/Electric_fence

    In a virtual electric fence system, each animal has a collar with a GPS unit which is set to produce first an audible warning and then a shock as the animal approaches a programmable boundary. Pet fences to control domestic dogs have been used since 1973, and the first system for livestock control was developed by Peck's Invisible Fence Co, now ...

  5. Collar (animal) - Wikipedia

    en.wikipedia.org/wiki/Collar_(animal)

    These collars administer an electric shock to the animal in training, in order to reinforce commands and eliminate any bad habits. It may be combined with an "invisible fence," a signal wire surrounding the dog's permitted area. The dog receives a shock if it strays too near the perimeter.

  6. Nofence - Wikipedia

    en.wikipedia.org/wiki/Nofence

    Nofence is a Norwegian company that makes GPS collars for farm animals (cattle, sheep, and goats) that discourage them from crossing virtual fences. [1] [2] Oscar Hovde Berntsen has been working on the idea of virtual fencing, as an alternative to fixed electric fencing, since the 1990s. [3] Nofence was incorporated in 2011. [3]

  7. JonBenet Ramsey case gets renewed attention 28 years after ...

    www.aol.com/jonben-t-ramsey-case-gets-110456888.html

    Advancements in DNA technology and a surge of public interest are rekindling hope for breakthroughs in the long-unsolved murder of 6-year-old JonBenet Ramsey, a case that has remained a haunting ...

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