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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]
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 ]
Two types of security systems Once you understand the risk you are exposed to, you proceed with the definition of a customized perimeter security system design. The security system is the set of all the methods, procedures, services, which allow, by the adoption of deterrent and protection methods, to reduce the risk.
A veterinarian's warning is an important public service announcement to all pet owners — especially people who have cats. Dr. Michele Forbes, DVM shared an update amid the news that the H5N1 ...
A laser fence mechanism detects objects passing the line of sight between a laser source and detector. [1] Stronger lasers can be used to injure entities passing the laser beam, as in a mosquito laser. [3] Fictional uses of laser fences often extend the concept so that fences may have the ability to prevent intruders by blocking or injuring them.
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