Info on Gem Manufacturing Co of Pittsburghh PA I have an old oiler from them and want the age of it?

Maybe this will help. I also have an old oil can from Gem Manufacturing Co, Pittsburg,Pa. It has patent dates of Mar.24,96 & June 5,1900 clearly impressed onto the base of the dispensing spout which screws into the can holding the oil itself. I believe these cans, especially marked ones, are pretty rare and might be collectible to classic car collectors.