Today in Tech History – December 8, 2017

1931 – US Patent No. 1,835,031 for a “concentric conducting system” was awarded to Lloyd Espenschied of Kew Gardens, New York, and Herman A. Affel of Ridgewood, New Jersey, and assigned to the American Telephone & Telegraph Co. Coaxial Cable had been patented.

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=1835031.PN.&OS=PN/1835031&RS=PN/1835031

1993 – The US Secretary of Defense declared the GPS system a dual use system that had Initial Operation Capability and opened the Standard Positioning System to civilians, which gave accuracy of nine meters horizontally.

http://www.usno.navy.mil/USNO/time/gps/gps-info

2010 – With the second launch of the SpaceX Dragon, SpaceX became the first privately held company to successfully launch, orbit and recover a spacecraft.

https://www.nasa.gov/offices/c3po/home/spacexfeature.html

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