Neither of those pullers was stamped with a part number, patent number, or manufacturer's name.
Both had only a small yellow sticker affixed to the yoke with the part number stamped on it.
I believe it was GJ member Coach James was the one who posted photos of his here a while back....
see HERE:
http://www.garagejournal.com/forum/showthread.php?p=5429832#post5429832
(* again: I should note that I
never saw one of those come back as a "warranty" with any of the pieces
broken. the only time those ever came back was when they buggered up the threads - generally the screw would be seized in the yoke and the drive end of the screw mushroomed from using an impact gun on them.)