Inventor
HANSEN MERLIN D
US4 patents
Patents
4 patentsUS5010958AApr 30, 1991
Multiple cup bridge plug for sealing a well casing and method
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US6550322B2Apr 22, 2003
Hydraulic strain sensor
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US6389890B1May 21, 2002
Hydraulic strain sensor
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US6550538B1Apr 22, 2003
Communication with a downhole tool
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