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The invention of the lie detector
The first lie detector was created by a physiologist who was also a police officer named John A. Larson. -
The invention of the blender
The blender was invented by a man named Stephen J. Poplawski. -
The invention of the Audiometer
A man named Dr. Harvey Fletcher invented the Audiometer. Which can evaluate hearing loss. -
The vacuum cleaner
The vacuum has been around for a while but was not very successful until a company called Hoover invented a positive agitation system. This increased cleanly dramatically. -
The invention of the electronic television
The electronic television was invented by Philo Taylor Farnsworth.