P

Inventor

POLK JR MATTHEW S

US9 patents
⚠️ This page may combine multiple inventors who share the name “POLK JR MATTHEW S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BRITANNIA INVEST CORP

5 patents
US7039212B2May 2, 2006

Weather resistant porting

BRITANNIA INVEST CORP181 citations95
US6937737B2Aug 30, 2005

Multi-channel audio surround sound from front located loudspeakers

BRITANNIA INVEST CORP58 citations94
US7231053B2Jun 12, 2007

Enhanced multi-channel audio surround sound from front located loudspeakers

BRITANNIA INVEST CORP21 citations91
US7162049B2Jan 9, 2007

Ported loudspeaker system and method with reduced air turbulence, bipolar radiation pattern and novel appearance

BRITANNIA INVEST CORP29 citations91
US6721434B2Apr 13, 2004

Loudspeaker mounting system

BRITANNIA INVEST CORP31 citations86

POLK AUDIO INC

1 patent
US7817812B2Oct 19, 2010

Compact audio reproduction system with large perceived acoustic size and image

POLK AUDIO INC9 citations83

KLOPFER GEORGE M

1 patent
USD251973SMay 29, 1979

Speaker cabinet

KLOPFER GEORGE M23 citations70

POLK INVEST CORPORATION

1 patent
USD350135SAug 30, 1994

Enclosed speaker for vehicle use

POLK INVEST CORPORATION11 citations65

MSI DFAT LLC

1 patent
US12411056B2Sep 9, 2025

High output acoustic system for direct field acoustic testing

MSI DFAT LLC0 citations58