Can anyone tell me the name of the tool maker of this plow planes? I feel like the markings are pretty clear but I searched everything I can think of but can't seem to find it.

The first word looks to be merschem. 
Possibly. 
No luck with google on that, however.

Actually, to me, the first name looks like Herschede (with the H off the edge of the wood).

Ok, i enlarged teh name and changed the contrast some in Irfan view and it looks more like

KERSCHEK & KUBITSEL    and

TEMESW(?)AR

It looks more like a sash plane from the end that I see in the one picture.