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Patent US912831 - INDICATING THJ IXTBK DSS JAOYSSIBS IS OS VS HICIDJS
INDICATING THJ IXTBK DSS JAOYSSIBS IS OS VS HICIDJS
SEYMOUR DOUGLAS-HAMILTON
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Patent number
: 912831
Filing date
: Dec 31, 1907
Issue date
: Feb 18, 1909
Inventor
:
SEYMOUR DOUGLAS-HAMILTON
Current U.S. Classification
:
116/50
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