JACK S. KILBY - FIRST DAY COVER SIGNED - HFSID 179514
Price: $220.00
JACK KILBY
Jack Kilby signs a First Day Cover promoting energy
conservation.
First Day Cover signed: "J S Kilby", 6½x3½. First Day Cover
honoring Energy Conservation, 13-cent embossed envelope, postmarked Ridley
Park, Pennsylvania, October 20, 1977, FIRST DAY OF ISSUE. Colorano
"Silk" cachet at left. In 1958, Kilby went to work at Texas Instruments.
Within a year, the electrical engineer had invented a monolithic integrated
circuit that he called a "microchip" (patent #3,138,743). He also
developed the first pocket calculator, "Pocketronic". One of over 60
inventions Kilby patented, the microchip made high-speed computing and
communication systems possible. Kilby was awarded the 2000 Nobel Prize in
Physics "for his part in the invention of the integrated circuit". Fine
condition.
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