This Month in History:

1846 Benjamin Palmer patents artificial leg

1879 African American inventor Thomas Elkins patents refrigerating apparatus

1851 Alvan Clark patents telescope

1930 Patent number US1781541 is awarded to Albert Einstein and Leó Szilárd for their invention of the Einstein refrigerator

1856 American Gail Borden is issued a patent for technology related to his invention of condensed milk

1904 King C. Gillette patents the Gillette razor blade

1866 Pierre Lallement patents rotary crank bicycle