Alfredo Ferrin

Follow

Person

Santa Ana, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Planar diaphragm loudspeaker and related methods
- Patent number 6,929,091
- Issue date Aug 16, 2005
- Sound Advance Systems, Inc.
- Alejandro Bertagni
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Planar diaphragm loudspeaker
- Patent number 5,693,917
- Issue date Dec 2, 1997
- Sound Advance Systems, Inc.
- Alejandro J. Bertagni
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Planar-type loudspeaker with dual density diaphragm
- Patent number 5,539,835
- Issue date Jul 23, 1996
- Sound Advance Systems, Inc.
- Alejandro J. Bertagni
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Planar-type loudspeaker with dual density diaphragm
- Patent number 5,425,107
- Issue date Jun 13, 1995
- Bertagni Electronic Sound Transducers, International Corporation
- Alejandro J. Bertagni
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Planar diaphragm loudspeaker and related methods
- Publication number 20040129492
- Publication date Jul 8, 2004
- Alejandro Bertagni
- H04 - ELECTRIC COMMUNICATION TECHNIQUE