73084701
Apr 22, 1976
Jun 13, 1978
COOLERS (HEAT EXCHANGERS AND ASSOCIATED COMPONENTS) UTILIZED FOR COOLING ENGINES USED PRIMARILY IN THE AGRICULTURAL IRRIGATING AND OIL PUMPING FIELDS
MachinerySAND AND SCREEN FILTERS FOR USE IN AGRICULTURAL IRRIGATION AND PROCESS INDUSTRIES USING WATER AS A HEAT EXCHANGE OR PROCESS MEDIUM
Environmental Control Apparatus