Day in Engineering History Archive - September 20
Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified.Please submit significant historical events and dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death date ;-) A couple years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred.
1819: Patent leather was manufactured for the first time by Seth Boyden. 1842: James Dewar, inventor of the flask that bears his name, was born. 1850: The United States Congress abolished the slave trade in the District of Columbia. 1853: Elisha Otis opened his safety elevator company in Yonkers, NY. 1921: KDKA in Pittsburgh, PA, started the world's first daily radio newscast. 1938: A patent was granted for "synthetic fiber" (nylon) to Wallace Carothers. 1962: The Queen Elizabeth II was launched.
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