Isaac Fischer Jr. patented sandpaper in Springfield, Vermont, US.
Source
Barbed wire was patented by Lucien B Smith in Ohio, US.
Swiss engineer George de Mestral patented velcro.
Amateur British chemist Sir James Jay invented invisible ink.
American businessman King Camp Gillette was granted his patent for the safety razor.
Inventor George Eastman patented his 35mm photographic film in the US.
