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http://www.google.com/patents/US167543?utm_source=gb-gplus-share
Patent US167543 - IMPROVEMENT IN HEAD-MUFFS
IMPROVEMENT IN HEAD-MUFFS
ISAAC B. KLEINEBT et al
› Overview
Abstract
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Description
Claims
Patent number
: 167543
Filing date
: Jul 21, 1875
Issue date
: Sep 7, 1875
Inventors
:
ISAAC B. KLEINEBT
,
ISAAC B. KLEINEBT
Current U.S. Classification
:
2/206
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4218777
Jul 12, 1978
Aug 26, 1980
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