Perhaps you are interested in the following logos.

ADP ADP vector
Algonquin Algonquin  vector
don algodon don algodon vector
Echo of Moscow label Echo of Moscow label vector
ISE ISE vector
Rolls Royce Rolls Royce  vector
100 Hz Virtual Dolby Surround 100 Hz Virtual Dolby Surround vector
ARIBA 1 ARIBA 1 vector
Accolade Accolade vector
Adcom 914 Adcom 914 vector
Ahrend Ahrend vector
AirLiance Materials AirLiance Materials vector
Aiwa 121 Aiwa 121 vector
Aki Aki vector
Amulette Amulette vector