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
Rudolph M. Hunter daughter of a Pittsburgh, Pennsylvania, physician. By late 1878 Hunter had established an office in Philadelphia to offer his services as a consulting engineer and patent attorney. In June 1879 he secured his first patent (No. 216,519), for a "process and apparatus" for making illuminating gas. He eventually held 299 US patents, 279 of them issued by 1902. He also secured seven Canadian and six British patents, all for inventions on which he also held a US patent. His inventions ranged from mechanical toys to industrial machinery, but most were for electrical devices and systems. Throughout his career as an