Air filters for protecting machines used in pipeline service and fluid flow systems; single and double filters for protecting machines used in pipeline service and fluid flow systems, namely, oil filters, steam filters, gasoline filters, grease extraction filters; convertible filters for protecting machines used in pipeline service and fluid flow systems; marine fuel filters and filter baskets of various meshes for protecting machines used in pipeline service and fluid flow systems; non-measu...

AIR STRAINERS, STRAINERS FOR OILS, STEAM, GASOLINE, GREASE EXTRACTION, AND COOLING WATER; DUPLEX STRAINERS FOR OILS, STEAM, GASOLINE, GREASE EXTRACTION, AND COOLING WATER; CONVERTIBLE STRAINERS; MARINE FUEL STRAINERS, AND STRAINER BASKETS OF VARIOUS MESHES FOR USE IN SUCH STRAINERS; NON-MEASURING PUMPS OF THE FOLLOWING KINDS-- ROTARY AIR PUMPS WITH SELF-CONTAINED LUBRICATING SYSTEMS, BOTH AIR-COOLED AND WATER-COOLED, ROTARY VACUUM PUMPS WITH SELF-CONTAINED LUBRICATING SYSTEMS, BOTH AIR-COOLED...

SEPARATORS FOR STRAINING AND FILTERING DEBRIS FROM FLUIDS; AND VALVES FOR CONTROLLING FLOW OF FLUIDS

FILTERS

AIR STRAINERS, STRAINERS FOR OILS, STEAM, GASOLINE, GREASE EXTRACTION, AND COOLING WATER; DUPLEX STRAINERS FOR OILS, STEAM, GASOLINE, GREASE EXTRACTION, AND COOLING WATER; CONVERTIBLE STRAINERS; MARINE FUEL STRAINERS, AND STRAINER BASKETS OF VARIOUS MESHES FOR USE IN SUCH STRAINERS

NON-MEASURING PUMPS OF THE FOLLOWING KINDS: ROTARY AIR PUMPS WITH SELF-CONTAINED LUBRICATING SYSTEMS, BOTH AIR-COOLED AND WATER COOLED, ROTARY VACUUM PUMPS WITH SELF-CONTAINED LUBRICATING SYSTEMS, BOTH AIR-COOLED AND WATER-COOLED; ROTARY AIR PUMPS WITH NO FLUID LUBRICATION IN THE INTERIORS THEREOF; ROTARY SUCTION PUMPS WITH NO FLUID LUBRICATION IN THE INTERIORS THEREOF; CENTRIFUGAL PUMPS FOR LIQUIDS; CENTRIFUGAL PUMPS FOR NON-LUBRICATING LIQUIDS; ROLLER PUMPS FOR HANDLING LUBRICATING FUEL OIL...

SPECIMENS OF MINERALS MOUNTED ON A SUITABLE BASE FOR VIEWING

SPECIMENS OF MINERALS MOUNTED WITHIN A TRANSPARENT ENCLOSURE

PHOTOGRAPHIC SLIDES