MANFREDI, JOHN Trademarks
THE BLACK BOXX 12AX7
Filed: March 6, 1989
VACUUM TUBE AUDIO PREAMP APPARATUS FOR THE REPRODUCTION OF AUDIO SIGNALS
Owned by: MANFREDI, JOHN
Serial Number: 73785011
THE BLACK BOXX 12AX7
Filed: January 11, 1991
vacuum tube audio preamp apparatus for the reproduction of audio signals
Owned by: MANFREDI, JOHN
Serial Number: 74129646
