Lewill wins the gold ring...
"Best Bung" found me an ebay listing with it mistakenly id'd as a tobacco plug cutter, but , it had a patent year...
It is not for removing bungs, it is for making the hole to put them in...
The ebay one also says 'enterprise', perhaps Enterprise manufacturing?
PS: The odd extra piece is for splitting the plug after boring to get it out of the cutter,
PPS: In datamp, but no example
http://www.datamp.org/patents/displayPatent.php?number=613132&typeCode=0PPPS: Joseph Fellows does have a different patent assigned to Enterprise Mfg (846193)