Little is know about the man who invented the supra lockbox except for that fact that he was all sick and tired of chasing down keys, so to speak, just to show clients listed properties for sale. The very first supra lockbox was actually crude – it was made out from a Yale bicycle lock and an aluminum container cast with sand. The first supra lockbox was made fifty years ago. The supra lock box today has evolved into a whole line of sophisticated to sophisticated items like electronic keys and access devices.There are many uses for supra lockboxes. But the long and short of their use is to provide security for living spaces, like homes and offices.