Phil Johnson

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Personal audio player with a removable multi-function module
- Patent number 6,606,281
- Issue date Aug 12, 2003
- Digital Networks North America, Inc.
- Clayton N. Cowgill
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Personal audio player with a removable multi-function module
- Publication number 20020015362
- Publication date Feb 7, 2002
- Clayton N. Cowgill
- G11 - INFORMATION STORAGE