The patents cater for every strain of 20th century society, from a self-tipping hat for the discerning gent to a harness support for a greyhound-riding monkey
Above: Artwork of a harness and support designed by Renfro Rennie that allows a monkey to ride 'jockey style' on the back of a greyhound. Monkey jockeys were used for a brief period in America and Australia during the 1930s.
Some of the other peculiar patents, which were obtained by the Science Photo Library, show eyeglasses for chickens to prevent them pecking out each other's eyes...
Above: The device designed by Andrew Jackson Jr. to protect the eyes of chickens from aggressive pecking by other chickens. This patent was filed in 1903.
An animal trap device designed by J.A. Williams in 1882 to kill vermin. Food bait is placed onto a spring-loaded lever. When the animal presses onto the bait, it fires the loaded pistol.