Arthur Schawlow & Charles Townes was granted the first patent for a laser.
Source
Inventor Phillip W Pratt obtained the patent for his sprinkler system designed to extinguish fires.
Noah Cushing patented the washing machine in Quebec, Canada.
George Westinghouse Jr. patented steam power brake devices in the US.
Barbed wire was patented by Lucien B Smith in Ohio, US.
The first movie projector, correctly named the kinetoscope, was patented by Thomas Edison.
