Derek Marlow Ewell

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Safety cane
- Patent number 7,654,275
- Issue date Feb 2, 2010
- Derek Marlow Ewell
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Thermal cane
- Patent number 7,335,171
- Issue date Feb 26, 2008
- Derek Marlow Ewell
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
Safety cane
- Publication number 20080169011
- Publication date Jul 17, 2008
- Derek Marlow Ewell
- A45 - HAND OR TRAVELLING ARTICLES
Information Patent Application
Thermal cane
- Publication number 20070239086
- Publication date Oct 11, 2007
- Derek Marlow Ewell
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE