Dolby Pro Logic

== Dolby Surround Pro Logic ==
=== 1990-2007 ===
===2003-2007===
==Dolby Pro Logic==
===2009-present===
Category:Dolby
Category:London
Category:San Francisco
Category:England
Category:Washington (state)
Category:United States
Category:International
Category:Technology companies in the United Kingdom
Category:199?
Category:Unknown year
Category:1990