Raymond A. Koehler

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Oak Grove, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for making plastic screen panels
- Patent number 4,452,656
- Issue date Jun 5, 1984
- UOP Inc.
- Henry E. Benson
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Well screen end fitting assembly and method of making same
- Patent number 4,428,423
- Issue date Jan 31, 1984
- UOP Inc.
- Raymond A. Koehler
- E21 - EARTH DRILLING MINING
Information Patent Grant
Abrasion resistant, reinforced screen panel member
- Patent number 4,374,169
- Issue date Feb 15, 1983
- UOP Inc.
- Gregory A. Gryskiewicz
- E04 - BUILDING
Information Patent Grant
Method of attaching fittings to a cylindrical well screen
- Patent number 4,200,218
- Issue date Apr 29, 1980
- UOP Inc.
- Raymond A. Koehler
- E21 - EARTH DRILLING MINING