Day:
This Day in Patent History - On November 21, 1854, Issac Von Bunschoten patented a rosin-oil lamp
On November 21, 1854, Issac Von Bunschoten patented a rosin-oil lamp. …
This Day in Patent History - On November 22, 1904, design patent for the Congressional Medal of Honor was granted to George Gillespie
On November 22, 1904, design patent for the Congressional Medal of Honor was granted to George Gillespie. …
This Day in Patent History - On November 20, 1923, a patent was granted to Garrett Morgan for a traffic signal
On November 20, 1923, a patent was granted to Garrett Morgan for a traffic signal. He is one of the first inventors of traffic signals…