May 25, 1942 Trademark Filings

LEVEL-TROL
Liquid Level Responsive Pressure Actuated Pilot Mechanism for Valves
Cancelled  ·  May 25, 1942  ·  71453241  · 
ALPHA-BLOX
PRINTER'S TYPE
Expired  ·  May 25, 1942  ·  71453227  ·