"I love that computer science has made mathematics into something like an experimental science. I was never all that good at proving things, but I love doing computer experiments."
I wonder if he invented this one; another failure to file patent. You can see how you might think of it; anyone familiar with machine shops or labs with compressed air know that compressed air is often used to dry materials.
According to Denis Gagnon, president of Exel Dryer, "the basic hand dryer was invented in 1948 and has gone virtually unchanged ever since." It may have been patented by someone in 1948, but Robert Heinlein wrote about it in 1940.
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'It extrudes material like a spider.'
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'When he had first built them, they had been crude indeed, flying mechanisms with little more than a reflex-response unit.'
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'... could seal the punctures.'
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'If you couldn't see the ads, how would you know what was fashionable?'
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'...the lower part of the suit was simply a rigid cylinder.'
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'Its lines wavered, flowed, and then painfully reformed.'
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'Had these machines in some incredible fashion been provided with brains?'
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'I used my implant to tell MILLIE what we wanted and she took care of it'
Phil Nuyttnn's City Under The Sea
'Under the lower roof there was no water, but a clear and luminous atmosphere...'
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