Herbert I. Gefvert

📍 Lake Forest, IL: #114 of 431 inventorsTop 30%

🗺 Illinois: #21,447 of 84,256 inventorsTop 30%

Overall (All Time): #1,287,362 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
5850457	Multi-dimensional sound reproduction system	—	1998-12-15
5533129	Multi-dimensional sound reproduction system	—	1996-07-02
4888804	Sound reproduction system	—	1989-12-19
4502149	Multi-purpose interchangeable modular auto loudspeaker system	—	1985-02-26