JO mfg seems to be war era, and not much past the 50's....
They did manage to (aquire a) patent (for) an eggbeater drill
http://www.datamp.org/patents/displayPatent.php?pn=2310759&id=14411
There are a few other references in the patent files as reference material, not much else...
Gotta be a military thing. I've got a JO Mfg. angled hand drill, used for drilling in really tight spaces (like inside airplane wings). It's also military says USAF on it. I think Proto made one, too.
