Assignee

HELLNICK DIETER

US·2 granted patents·56 citations·filing 1986–1986

Technology mixE21B2 B23B1 B23G1 F16L1 Y10T1

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2 records

0164US4763737ADownhole cutterHELLNICK DIETER·Filed 1986·Granted Aug 16, 1988·39 cites·14 claims
0253US4708038AMethod for machining and improved modified threaded collarHELLNICK DIETER·Filed 1986·Granted Nov 24, 1987·17 cites·9 claims

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