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 June 20
 1840:
Samuel
Morse was granted a patent for telegraphy signals. 1918: The X-ray expert
Dr. Eugene W. Caldwell, died of X-ray burns in NY. 1935: The
U.S. Army Air Forces established and headed by General Hap Arnold,
replacing the Army Air Corps. 1939: The world's first airplane to be propelled solely
by a liquid-fuelled rocket, the
Heinkel He-176,
flew for first time. 1950: Willie Mays graduated from high school and immediately
signed with the New York Giants. 1977: The Trans-Alaska Pipeline began carrying
oil from the Arctic Ocean to Prince William Sound. 1980: "Blues Brothers" with
Dan Aykroyd and John Belushi premiered. 1981:
Henri-Gaston
Busignies, developer of HF (high frequency) direction finding equipment, died.
1996: Westinghouse Electric agreed to buy
Infinity Broadcasting for $4.9 billion. 2005:
Jack Kilby, inventor of the integrated circuit, died. 2006: IBM
and the Georgia Institute of Technology demonstrated the first silicon-based
transistor
that operates at 500 GHz.
Note: These
historical tidbits (see daily
list) 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. Many 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. Images used in the logos are often from open source
websites like Wikipedia, and are specifically credited with a hyperlink back to
the source where possible.
Fair Use laws permit
small samples of copyrighted content.
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