Douglas Raum

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Beverly, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for user authentication
- Patent number 8,194,651
- Issue date Jun 5, 2012
- Zoom Telephonics, Inc.
- Dean N. Panagopoulos
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for user authentication
- Publication number 20060050688
- Publication date Mar 9, 2006
- Zoom Telephonics, Inc.
- Dean N. Panagopoulos
- H04 - ELECTRIC COMMUNICATION TECHNIQUE