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Sewer cleaning machine
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Patent number D271436
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Issue date Nov 15, 1983
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Emerson Electric Co.
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Larry F. Babb
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D32 - Washing, cleaning, or drying machine
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Powered collator
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Patent number D260258
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Issue date Aug 18, 1981
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Swingline, Inc.
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Elsio J. Loos
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D14 - Recording, communication, or information retrieval equipment
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Console for central dictation system
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Patent number D250707
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Issue date Jan 2, 1979
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Dictaphone Corporation
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Arthur J. Pulos
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D14 - Recording, communication, or information retrieval equipment
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Retinoscope
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Patent number D243973
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Issue date Apr 5, 1977
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Welch Allyn, Inc.
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Arthur J. Pulos
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D24 - Medical and laboratory equipment