American inventor Theophilus Van Kannel was granted the patent for the revolving door.
Source
Inventor William Austin Burt patented the typographer, also known as the typewriter in the US.
William Painter secured a patent for the capped bottle opener.
Inventor Percy L. Spencer patented the Microwave Oven.
James H Mason patented the first US coffee percolator.
The first printing of the Gutenberg Bible was completed.
