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"JR. JOHN T. CALLAHAN"
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"JR. JOHN T. CALLAHAN"
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Combination tool
by
Callahan, Dorothy A
,
Callahan
,
Jr
.,
John T
Year of Publication
11.09.2018
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Vending machine
by
JR
.
JOHN T
.
CALLAHAN
Year of Publication
12.05.1942
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Well drilling indicating apparatus
by
JR
.
JOHN T
.
CALLAHAN
,
PITCHER JAMES W
Year of Publication
30.12.1952
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Apparatus for measuring the rate of drilling fluid flow through a well
by
JR
.
JOHN T
.
CALLAHAN
,
PITCHER JAMES W
Year of Publication
08.05.1951
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Pressure measuring apparatus
by
JR
.
JOHN T
.
CALLAHAN
,
ADAIR PAUL F
,
KOCMICH DONALD O
Year of Publication
01.11.1949
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Format
Patent
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Subject Area
chemistry
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medicine
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sciences
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physics
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Topic
physics
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earth drilling
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earth drilling, e.g. deep drilling
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fixed constructions
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measuring
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mining
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English
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esp@cenet
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