Duane B. Haagensen

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Edina, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for processing dielectric materials with micro...
- Patent number 4,714,812
- Issue date Dec 22, 1987
- Woodhead, III; John F.
- Duane B. Haagensen
- F26 - DRYING
Information Patent Grant
Oil recovery system and method
- Patent number 4,620,593
- Issue date Nov 4, 1986
- Duane B. Haagensen
- E21 - EARTH DRILLING MINING