Gold Star Manufacturing, Inc.

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Laurens, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Continuous soil sampling system and method
- Patent number 5,450,913
- Issue date Sep 19, 1995
- Gold Star Manufacturing, Inc.
- Larry C. Mefferd
- E21 - EARTH DRILLING MINING
Information Patent Grant
Tube section having slots for sampling
- Patent number 5,372,208
- Issue date Dec 13, 1994
- Gold Star Manufacturing, Inc.
- Roy J. Mefferd
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus and method for coupling elongated members
- Patent number 5,269,572
- Issue date Dec 14, 1993
- Gold Star Manufacturing, Inc.
- Floyd R. Mefferd
- E21 - EARTH DRILLING MINING