-Inventions of the Past- By swelser 300 cotton grin Mar 10, 1846 sewing machine Mar 9, 1849 safty pin Mar 10, 1893 Zipper Mar 10, 1903 Airplane Mar 9, 1920 television Mar 10, 1920 Frozen food Mar 10, 2011 Tape Recorder Mar 10, 3000 Wheel