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http://www.google.com/patents/US1516207?utm_source=gb-gplus-share
Patent US1516207 - HARDNESS-TESTING MACHINE
HARDNESS-TESTING MACHINE
S. P. ROCKWELL
› Overview
Abstract
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Description
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Patent number
: 1516207
Filing date
: Sep 11, 1919
Issue date
: Nov 18, 1924
Inventor
:
S. P. ROCKWELL
Current U.S. Classification
:
73/83
View patent at USPTO
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US8061544
Jan 25, 2007
Nov 22, 2011
World Bottling Cap, LLC
Easy-pull crown bottle cap
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