Douglas Ronald Warren

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Prairie du Sac, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method for repairing an underground pipeline
- Patent number 11,391,406
- Issue date Jul 19, 2022
- The Charles Machine Works, Inc.
- Peder Dahl-Nielsen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
System And Method For Repairing An Underground Pipeline
- Publication number 20210172556
- Publication date Jun 10, 2021
- The Charles Machine Works, Inc.
- Peder Dahl-Nielsen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...