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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 ]
The goal of perimeter fence. The goal of perimeter fence is to stop or prevent the incident and reduce the level of risk. Doing so discourages the perpetrator from committing a harmful event. For example, a high wall with fence posts that protects a property discourages criminals from intruding and, when an incident occurs, increases the time ...
Other pet fences are wireless. Rather than using an underground wire, they emit a radio signal from a central unit, and activate when the pet travels beyond a certain radius from the unit. In another type, the collar uses GPS signals to determine proximity to a predetermined "virtual fence", without the need for any physical installation at all.
Two geofences defined in a GPS application. A geofence is a virtual "perimeter" or "fence" around a given geographic feature. [1] A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries).
In 1998 Magal acquired Perimeter Products Inc., a manufacturer of fence-mounted sensors and bistatic microwave sensors, where it remained as a separate entity. In 2003 Senstar, via Perimeter Products Inc., acquired Dominion Wireless, a manufacturer of personal duress systems, [ 20 ] with all three organizations being consolidated in 2009 at the ...
They were met with an unusual sight – a heavy, metal fence around 10 feet high surrounded the White House, the street in front, and a bronze statue of former President Andrew Jackson astride his ...
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