When were lie detectors invented?

Answer The first lie detector was invented by Cesare Lombroso in 1895. This device, named plethysmograph, was very different than the polygraph used today. The plethysmograph simply monitored blood flow a... Read More »

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Who invented radar detectors?

Dale Smith invented the first radar detector in the early 1970s due to a nationwide speed limit reduction initiated by the Arab Oil Embargo. The first radar detector was called the Fuzzbuster.Refer... Read More »

When were smoke detectors invented?

The first battery-operated residential smoke detector was invented in 1967 by Duane D. Pearsall of BRK Electronics. The company went on to develop and market the First Alert brand of smoke detector... Read More »

Who invented smoke detectors?

Francis Robbins Upton and Fernando J. Dibble invented the first automatic electric fire alarm in 1890. In 1967, Duane D. Pearsall invented the first affordable smoke detectors that could be used i... Read More »

Who invented carbon monoxide detectors?

Chester S. Gordon and James T. Lowe, "assignors to American Telephone and Telegraph Company," submitted the earliest U.S. patent for a carbon monoxide detector. They received the patent in October ... Read More »