The plastic shirt collar was patented in the US by Walter Hunt.
Source
James H Mason patented the first US coffee percolator.
Inventor Percy L. Spencer patented the Microwave Oven.
Inventor Phillip W Pratt obtained the patent for his sprinkler system designed to extinguish fires.
The first US fire extinguisher patent was granted to Alanson Crane, Virginia.
Inventor Daniel Cooper patented the first time clock in the US.
