Charles D. Grabowski

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Corcoran, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Rail re-profiling method and apparatus
- Patent number 10,352,001
- Issue date Jul 16, 2019
- GREENLEAF TECHNOLOGY CORPORATION
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Rail re-profiling method and apparatus
- Patent number 9,834,891
- Issue date Dec 5, 2017
- GREENLEAF TECHNOLOGY CORPORATION
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Rail re-profiling method and apparatus
- Patent number 9,617,691
- Issue date Apr 11, 2017
- GREENLEAF TECHNOLOGY CORPORATION
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
RAIL RE-PROFILING METHOD AND APPARATUS
- Publication number 20200087865
- Publication date Mar 19, 2020
- GREENLEAF TECHNOLOGY CORPORATION
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
RAIL RE-PROFILING METHOD AND APPARATUS
- Publication number 20170159245
- Publication date Jun 8, 2017
- GREENLEAF TECHNOLOGY CORPORATION
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
RAIL RE-PROFILING METHOD AND APPARATUS
- Publication number 20160130768
- Publication date May 12, 2016
- Greenleaf Technology Corporation
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
RAIL RE-PROFILING METHOD AND APPARATUS
- Publication number 20140271012
- Publication date Sep 18, 2014
- Donald R. Hughes
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR