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Patent US757012 - ALEXANDEE GRAHAM BELL
ALEXANDEE GRAHAM BELL
ALEXANDEE GRAHAM BELL et al
› Overview
Abstract
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Description
Claims
Patent number
: 757012
Filing date
: Jun 1, 1903
Issue date
: Apr 12, 1904
Inventors
:
ALEXANDEE GRAHAM BELL
,
ALEXANDEE GRAHAM BELL
Current U.S. Classification
:
244/153.00R
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Drawings