Artur Fischer from plastic materials (Polyamide) and is available in various shapes and sizes since 1958 (see Wall plug). Fischer held over 1100 patents and overtook Thomas Alva Edison, who held 1093 patents. Fischer also held 5867 trade rights and invented fischertechnik. Further inventions are (bone-)plugs for fixing bone fractures and one of Fischer’s most recent inventions is a gadget that makes it possible to hold and cut the top off an egg of any size. He got started on the problem when a hotel owner complained to him that his guests, on opening their boiled eggs for breakfast, always made a
Inventions and Their Management printing in June 1948 and a fourth in June 1950. A third edition was issued by the same publisher in November 1951 and was reprinted, revised, in 1954. An additional printing was issued by Laurel Publishing in 1957. The work was revised and reissued under the new title Inventions, Patents, and Their Management by Van Nostrand in 1959. It was reprinted by Litton Educational publishers in 1968. The work has been translated into Japanese. The book contains a comprehensive study of invention as it relates to patents and patent law, trademarks, and copyright in the United States, with extensive exploration