The Fisher Space Pen was designed and created by Paul Fisher in 1968. The pen was designed by Paul as he found a need for a use of a pen in space as astronuats began to explore our universe. There was no pen that was able to write in the extreme conditions of space : FREEZING COLD, BOILING HEAT VACUUM. The Fisher space pen is the ultimate in dependability. Every Space Pen is guaranteed to perform in temperatures from -30 to 250 degrees F, underwater, in zero gravity at any angle-even upside down! It's reliability means it's the only pen you`ll ever need.