The world’s favorite paper joiner, the stapler was patented by C. H. Gould in England.
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Inventor Benjamin J. Lane patented the first self-contained gas mask.
Swiss engineer George de Mestral patented velcro.
Inventor Richard Rhodes received the patent for a hearing aid.
A patent was awarded to Willis Carrier, which gave us the world’s first Air Conditioner.
The lie detector, invented in 1921 by John Augustus Larson, was first used in the Netherlands.
