Jack D. Nelmark

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New Berlin, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for handling drill pipes
- Patent number 4,595,066
- Issue date Jun 17, 1986
- Becor Western, Inc.
- Jack D. Nelmark
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill shock absorber
- Patent number 3,947,009
- Issue date Mar 30, 1976
- Bucyrus-Erie Company
- Jack D. Nelmark
- E21 - EARTH DRILLING MINING
Information Patent Grant
Resilient guide bushing mounting for blast hole drills or the like
- Patent number 3,944,300
- Issue date Mar 16, 1976
- Bucyrus-Erie Company
- Tom Learmont
- E21 - EARTH DRILLING MINING