Where did James A. Bauer invent the coin changer?

Answer James A. Bauer invented the coin changer mechanism--a type of vending machine that changes dollar bills into coins--in Monroeville, Pennsylvania. It was patented on January 20, 1970 by the Westingh... Read More »

Top Q&A For: Where did James A. Bauer invent the coin changer

Who made the coin changer?

James A. Bauer, an African-American inventor, submitted his patent on November 29, 1967 for the coin change machine; it was accepted on January 1, 1970. The machine exchanged paper currency for coi... Read More »

Who invented the coin changer mechanism?

The original bill and coin changer (Patent #3690332) was invented by David D. Dykehouse, Oliver G. Okkonen and Norman J. Zoodsma, all of Michigan. They applied for a patent on December 22, 1969, a... Read More »

What did James Dyson invent?

James Dyson invented the Dyson vacuum cleaner, which uses cyclone technology to prevent it from clogging or losing suction. Dyson was born May 2, 1947, in Norfolk, England, and invented his vacuum ... Read More »

When did James Pillans invent the blackboard?

James Pillans invented the blackboard circa 1801, when he was the headmaster of the Old High School of Edinburgh, in Scotland. The invention quickly became widespread, revolutionizing the way teach... Read More »