Percy L. Spencer invented the Microwave Oven
The Allen key, or hex key, was invented in 1910. It was invented by William G. Allen, but first commercialized by P. L. Robertson.
Sciencology
Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.
i think it was invented in the 1200s i think it was invented in the 1200s
alfred l cralle
Alfred L. Cralle died in 1920.
Alfred L. Cralle was born on September 4, 1866 in Kenbridge, Virginia
Alfred L. Cralle was married to Josephine Cozzens.
Alfred L Cralle invented the ice cream scoop in Pittsburgh, Pennsylvania. He was working as a porter when he noticed how hard it was to serve ice cream. He invented the scoop, which was strong, durable, easy to operate with one hand, and inexpensive. He was granted U.S. Patent #576395, on February 2, 1897.
Alfred L. Cralle was born to parents Thomas and Eliza Cralle. He came from a family that valued education and entrepreneurship, which likely influenced his own accomplishments as an inventor and businessman.
Alfred cralle
a.l. cralle
Alfred L. Cralle, the inventor of the ice cream scoop, passed away on May 3, 1920.
A.L. Cralle patents Ice Cream Mold February 2, 1897 Cralle, A. L. Ice-Cream Mold Feb. 02, 1897 Patent No.576,395
the ice cream scooper
Augustus Jackson created ice cream in the 1800s years later another blackman Alfred L. Cralle created the ice cream scope.