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Inside pipe diameter caliper using coaxial excitation and pickup coils
US 3,417,325 A
Filed
: 02/15/1968
Issued
: 12/17/1968
Est. Priority Date
: 02/15/1968
Status: Expired due to Term
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Current Assignee
Ira J. Mccullough
,
Stanley G. Stroud
Original Assignee
Ira J. Mccullough
,
Stanley G. Stroud
Inventors
Mccullough, Ira J.
,
Stroud, Stanley G.
Application Number
US04/705,860
Time in Patent Office
306 Days
Field of Search
US Class Current
324/221
CPC Class Codes
E21B 47/085
using radiant means, e.g. a...
G01B 7/13
Internal diameters
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