By Associated Press - Sunday, November 5, 2017

DALLAS (AP) - A prototype of the first integrated circuit built at Texas Instruments has failed to sell at auction.

A spokesman for Dallas-based Heritage Auctions said Sunday that the microchip is now available for sale, until Dec. 4, for $432,500. Officials had expected the item to sell on Saturday for about $400,000.

The prototype was made available by the family of Tom Yeargan, a technician who worked with engineer Jack Kilby.

Kilby invented the integrated circuit, which opened the way for the microchips that are the brains of today’s computers. Kilby won the 2000 Nobel Prize in physics for his work.

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