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Controller for a door operator
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Patent number 6,184,641
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Issue date Feb 6, 2001
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The Chamberlain Group, Inc.
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Terence E. Crimmins
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Centrifugal switch and motor control
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Patent number 4,334,161
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Issue date Jun 8, 1982
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The Alliance Manufacturing Company, Inc.
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Alvin J. Carli
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3797326
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Patent number 3,797,326
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Issue date Mar 19, 1974
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3774295
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Patent number 3,774,295
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Issue date Nov 27, 1973
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3736483
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Patent number 3,736,483
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Issue date May 29, 1973
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES