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http://www.google.com/patents/US383626?utm_source=gb-gplus-share
Patent US383626 - CHIMNEY COWL AND VENTILATOR
CHIMNEY COWL AND VENTILATOR
JOHN D. CASHILL
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Abstract
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Description
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Patent number
: 383626
Issue date
: May 29, 1888
Inventor
:
JOHN D. CASHILL
Current U.S. Classification
:
454/20
;
454/41
View patent at USPTO
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