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
Timeline of United States inventions (before 1890) further into conformity with international patent law. The modern-day provisions of the law applied to inventions are laid out in Title 35 of the United States Code (Ch. 950, sec. 1, 66 Stat. 792). From 1836 to 2011, the United States Patent and Trademark Office (USPTO) has granted a total of 7,861,317 patents relating to several well-known inventions appearing throughout the timeline below. 1749 Lightning rod 1752 Flexible urinary catheter 1761 Armonica 1776 Swivel chair 1782 Flatboat 1784 Bifocals 1785 Artificial diffraction grating 1787 Automatic flour mill 1792 Cracker 1793 Cotton gin 1795 Wheel cypher 1796 Rumford fireplace 1796 Cupcake