Patent of the Day: Calling Device for Telephone-Exchanges
On this day in 1898 the patent for Calling Device for Telephone-Exchanges was granted. U.S. Patent No. 597,062.
Patent of the Day: Breech Mechanism for Guns
On this day in 1896 the patent for Breech Mechanism for Guns was granted. U. S. Patent No. 552,560.
Patent of the Day: Decoy Duck
On this day in 1903 the patent for Decoy Duck was granted. U.S. Patent No. 717,790.
Patent of the Day: Combined Toboggan and Sled
On this day in 1926, the patent for Combined Toboggan and Sled was granted. U.S. Patent No. 1,568,493.
Patent of the Day: Bill Holder
On this day in 1919 the patent for Bill Holder was granted. U.S. Patent No. 1,326,602.
Patent of the Day: Ironing Board
On this day in 1903 the patent for Ironing Board was granted. U.S. Patent No. 747,952.
Patent of the Day: Combined Tent and Wagon
On this day in 1886 the patent for Combined Tent and Wagon was granted. U.S. Patent No. 355,231.
Patent of the Day: Motor or Engine (Rotary-Engine Auto)
On this day in 1896 the patent for Motor or Engine was granted. U.S. Patent No. 573,174.
Patent of the Day: Smut Machine
On this day in 1841, the patent for Smut Machine was granted. U.S. Patent No. 2,390.
Patent of the Day: Sterilizing Apparatus
On this day in 1912 the patent for Sterilizing Apparatus was granted. U.S. Patent No. 1,046,842.
Patent of the Day: Denture Attaching Device
On this day in 1919 the patent for Denture Attaching Device was granted. U.S. Patent No. 1,324,476.
Patent of the Day: Tattooing Machine
On this day in 1891 the patent for Tattooing Machine was granted. U.S. Patent No. 464,801.