Originally Posted by Retro Grouch
The bad news is that I don't know the name of the manufacturer and it doesn't have any identifying markings on it.
There are a couple...
The Crank Stand marketed under a few different brand names...
The original was the "Standit"... which was even more simple than the Crank Stand; again, all black with a nice flat base and a powdercoated channel that you dropped the crank arm into.