Patent of the Day: Secret Communication System
On this day in 1942 the patent application for Secret Communication System was granted. U.S. Patent No. 2,292,387.
Patent of the Day: Electrical Stringed Musical Instrument (Electric Guitar)
On this day in 1937 the patent application for Electrical Stringed Musical Instrument was granted. U.S. Patent No. 2,089,171.
Patent of the Day: Skirt Protector
On this day in 1883 the patent application for Skirt Protector was granted. U.S. Patent No. 282,646.
Patent of the Day: Cathode Ray Tube
On this day in 1935 the patent application for Cathode Ray Tube was granted. U.S. Patent No. 2,010,712.
Patent of the Day: Hair Singer
On this day in 1890 the patent application for Hair Singer was granted. U.S. Patent No. 433,439.
Patent of the Day: Method of Making Potash (first patent granted in U.S.)
On this day in 1790 the patent application for Method of Making Potash was granted. U.S. Patent No. X000001.
Patent of the Day: Whiskey Aging Device
On this day in 1940 the patent application for Whiskey Aging Device was granted. U.S. Patent No. 2,209,474.
Patent of the Day: Dental Breath Guard
On this day in 1914 the patent application for Dental Breath Guard was granted. U.S. Patent No. 302,629.
Patent of the Day: Apparatus for Automatically Photographing Persons Moving Along a Confined Way
On this day in 1914 the patent application for Apparatus for Automatically Photographing Persons Moving Along a Confined Waywas granted. U.S. Patent No. 1,105,484.
Patent of the Day: Glass Working Machine
On this day in 1915 the patent application for Glass Working Machine was granted. U.S. Patent No. 1,147,892.
Patent of the Day: Sausage-Linking Machine
On this day in 1912 the patent application for Sausage-Linking Machine was granted. U.S. Patent No. 1,033,154.
Patent of the Day: Shoe (Salvatore Ferragamo)
On this day in 1952 the design patent application for Shoe was granted. U.S. Patent No. Des. 170,015.