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US2778503A
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Quick-couplers for securing oilrefining elements in housings
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Combined quick-coupler and hollow core for an oil-refining pack
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Method of making a compressible oil filter pack
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Compressible oil filter pack
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Machine and method of making oil filter packs
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Oil-refining foldable pack
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Oil refiner pack
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Oil refiner pack casing
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Oil refiner pack
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Oil refiner
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Oil refiner pack
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Oil refiner
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Crank case cleaner
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CA553470A
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Method of making a compressible oil filter pack
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CA543803A
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Removable oil filter coupling
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CA543802A
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Removable oil filter coupling
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