When was the flyswatter invented?

Horace Spatula of Hungary invented spatula in 1798 as an invention for killing the common housefly. However, a similar invention, called the fly swatter was being developed in England at the same. The fly swatter caught on and unfortunately Spatula never lived to see his invention used as is today - an indispensable kitchen utensil for making hamburgers and pancakes.

In the summer of 1905, Kansas was plagued by an overabundance of flies, which, as well as causing annoyance, aided in the spread of disease. Dr. Samuel Crumbine, a member of the Kansas board of health, wanted to raise public awareness of the threat of flies. He was inspired by a chant at a Topeka softball game: "swat the ball". In a health bulletin published soon afterward, he exhorted Kansans to "swat the fly".

In response, a schoolteacher named Frank H. Rose created the "fly bat", a device consisting of a yardstick attached to a piece of screen. Crumbine invented the device now commonly known as the fly swatter.

https://en.wikipedia.org/wiki/Flyswatter