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US3147502A
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Cleaning mops and applicators
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US2967317A
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Scrubbing mop
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US2833179A
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Slide projector
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US2843951A
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Automatic transport system for slide projectors
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US2757398A
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Foldable mop with precompressed scrubbing element and method of assembly
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US2670488A
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Foldable mop
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US2671236A
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Sponge mop with adjustable wringer plate
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US2663042A
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Self-adjusting mophead
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US2523331A
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Photographic print washer
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US2539475A
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Photographic print washer
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US2510142A
|
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Photographic printer having air flow film tautening mechanism
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US2547974A
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Quick emptying, movably mounted, spring-loaded supply container
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US2480880A
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Developer-roll film
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US2425344A
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Reel
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US2323934A
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Film drier
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US2376383A
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Automatic shutoff valve for gasoline burners
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US2286229A
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Portable film developing apparatus
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US2305636A
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Spool supporting and positioning means in photographic printers
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US2328030A
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Hot-air heater
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US2266803A
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Mixing tank and support
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