Dale K. Nelson

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Minneapolis, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
High pressure mechanical plug device
- Patent number 4,817,671
- Issue date Apr 4, 1989
- Cherne Industries, Inc.
- Allen D. Mathison
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Pipe joint sealing and testing apparatus
- Patent number 4,763,511
- Issue date Aug 16, 1988
- Cherne Industries, Inc.
- Allen D. Mathison
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Expansible pneumatic plug device
- Patent number 4,614,206
- Issue date Sep 30, 1986
- Cherne Industries, Inc.
- Allen D. Mathison
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Portable waterproofing apparatus
- Patent number 4,588,110
- Issue date May 13, 1986
- Cherne Industries, Inc.
- Dale K. Nelson
- B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
Information Patent Grant
Connector valve assembly for inflatable packer device
- Patent number 4,572,228
- Issue date Feb 25, 1986
- Cherne Industries, Inc.
- Richard E. Larson
- G01 - MEASURING TESTING
Information Patent Grant
Mechanical plug device
- Patent number 4,493,344
- Issue date Jan 15, 1985
- Cherne Industries, Inc.
- Allen D. Mathison
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL