Douglas L. Lewis

Follow

Person

St. Paul Park, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Radio frequency proximity detection and identification system and m...
- Patent number 7,460,827
- Issue date Dec 2, 2008
- Arbitron, Inc.
- Paul R. Schuster
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Bipolar ion detector
- Patent number 7,242,008
- Issue date Jul 10, 2007
- The Johns Hopkins University
- Scott C. Ecelberger
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Sonic transducer and feedback control method thereof
- Patent number 6,392,327
- Issue date May 21, 2002
- Douglas L. Lewis
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Bipolar ion detector
- Publication number 20050258356
- Publication date Nov 24, 2005
- Scott C. Ecelberger
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Radio frequency proximity detection and identification system and m...
- Publication number 20040027271
- Publication date Feb 12, 2004
- Paul R. Schuster
- H04 - ELECTRIC COMMUNICATION TECHNIQUE