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VBWYp TIL Bridgestone patented fire-retardant tyres in 1996
1aYKV TIL in 1972, The Los Alamos National Laboratories patented a nuclear tunnel boring machine, claiming it could reach depths of 18+ miles. It uses molten lithium to melt through rock, leaving behind a tunnel with a glass-like finish.
Z8ARv TIL In 1965, a patent was filed for a "birthing apparatus" which would spin pregnant women around at as much as 7G until their baby was flung out from the centrifugal force.