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http://www.google.ca/patents/US1439316?utm_source=gb-gplus-share
Patent US1439316 - BEST AVAILABLE -COPY-
BEST AVAILABLE -COPY-
› Overview
Abstract
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Description
Claims
Patent number
: 1439316
Filing date
: 27 Jan 1921
Issue date
: 19 Dec 1922
Current U.S. Classification
:
415/4.4
;
416/119
;
416/140
View patent at USPTO
Search USPTO Assignment Database
Referenced by
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Issue date
Original Assignee
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US4134710
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16 Jan 1979
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