US PATENT SUBCLASS 285 / 922
SAFETY AND QUICK RELEASE FOR DRILL PIPES
Current as of:
June, 1999
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285 /
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PIPE JOINTS OR COUPLINGS
922
SAFETY AND QUICK RELEASE FOR DRILL PIPES
DEFINITION
Classification: 285/922
SAFETY AND QUICK RELEASE FOR DRILL PIPES:
(under the class definition) Art collection drawn to safety and quick release for drill pipe concepts.
