Author: David Fotland
Date: 13:53:54 03/02/98
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On February 24, 1998 at 14:51:25, Robert Hyatt wrote: >On February 24, 1998 at 12:21:58, Steven Schwartz wrote: > >>On February 24, 1998 at 12:07:18, Bert Seifriz wrote: >> > > >Of course this is only about 13 years after the technology was >displayed by Ken Thompson in Washington DC, 1978, at the ACM event >that year. :) > >It's a shame no one took up the gauntlet and challenged the patent >based on widely-known prior work by Ken. Do you know that this patent uses the same technique as Ken did? The patent describes a scheme with two set of parallel wires, orthogonal to each other, and not touching, multiple frequencies on the wires, and resonators in the pieces. Anyone who wants to read the patent can look it up at the IBM patent site, http://patent.womplex.ibm.com/ Just do a search for the patent number (5129654). I found it with a search for the inventor's last name, but searching by number is faster. He didn't patent the idea of a game board that detects pieces. He patented a specific method of detecting pieces. David Fotland
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