Isobaric Trademarks

ISOBARIC BASS DRIVER
loudspeakers
Abandoned  ·  January 24, 1992  ·  74240344  · 
ISOBARIC BASS INJECTION
audio equipment; namely, speakers, amplifiers, preamplifiers, frequency cross over circuit boards, equalizers, AM/FM tuners, tape and CD players, audio cables and audio connectors
Abandoned  ·  November 22, 1991  ·  74224079  ·