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
S. Y. Lee Lee obtained his PhD at the Massachusetts Institute of Technology in 1945. After graduation, Lee soon taught engineering at MIT; and was promoted from teaching assistant to full professor and finally Professor Emeritus after his retirement in 1974. In 1985, Lee was elected Member of the United States National Academy of Engineering for his "original research on control valve stability, for innovative dynamic measurement instrumentation, and for successful entrepreneurial commercialization of his inventions". Lee has been granted many US patents. Lee was a notable businessman and founded or co-founded several companies specialized in process control and hydrodynamic instruments. Lee co-founded