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US 2,957,338 A
Filed
: 11/29/1957
Issued
: 10/25/1960
Est. Priority Date
: 11/29/1957
Status: Expired due to Term
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Current Assignee
Harvey T. Kennedy
,
Paul B. Crawford
Original Assignee
Harvey T. Kennedy
,
Paul B. Crawford
Inventors
Kennedy, Harvey T.
,
Crawford, Paul B.
Application Number
US03/699,825
Time in Patent Office
1,061 Days
Field of Search
US Class Current
73/54.23
CPC Class Codes
G01N 11/12
by measuring rising or fall...
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