On March 13, 1877, Chester Greenwood received a patent for earmuffs. Chester Greenwood invented the earmuff in 1873, at the age of 15. He reportedly…
Tag: TDIH
This Day in Patent History - On February 28, 1956, Jay Forrester was awarded a patent for RAM
On February 28, 1956, Jay Forrester was awarded a patent for his coincident current magnetic core memory. Forrester’s invention became the standard memory device for…
This Day in Patent History - On February 27, 1900, Felix Hoffman patented acetyl salicylic acid aka aspirin
Within a two-week period in August 1897, Felix Hoffmann synthesized two drugs: aspirin, one of the most widely beneficial drugs ever, and heroin, one of…
This Day in Patent History - On February 26, 1947, W.T. Graham was granted a patent for a Vibrating plow
On February 26, 1947, W.T. Graham was granted a patent for a Vibrating plow, which is sold worlwide to this day. Graham and Hoeme (partners)…
This Day in Patent History - On February 25, 1902 John Holland was granted a patent for a submarine
On February 25, 1902 John Holland (an Irish engineer) was granted a patent for a submarine. Holland developed the first submarine to be formally commissioned…
This Day in Patent History - On Februay 24, 1931, Parker Pen patented the iconic desk sets for supporting fountain pens
On Februay 24, 1931, Parker Pen patented desk sets for supporting fountain pens. Pen receptable used to be a standard feature of all work desks.…
This Day in Patent History - On February 23, 1897, Nikola Tesla received a patent for electrical condensers and coils
On February 23, 1897, Nikola Tesla received a patent for electrical condensers and coils. The features of the patent: 1. Improvements of condensers, transformers, self-induction…
This Day in Patent History - On February 20, 1872, Luther Crowell patented a machine that manufactured the square-bottom paper grocery bags
On February 20, 1872, Luther Crowell patented a machine that manufactured the square-bottom paper grocery bags. The square-bottom paper grocery bag has been around well…
This Day in Patent History - On February 19, 1878, Thomas Edison received a patent for the phonograph
On February 19, 1878, Thomas Edison received a patent for the phonograph. The photo shows Thomas Edison with his patented phonograph.The device could mechanically record…
This Day in Patent History - On February 21, 1865 John Deere (blacksmith) received a patent for plow
On February 21, 1865 John Deere (blacksmith) received a patent for ploughs. He founded Deere & Company in 1837, which still is a major player…