3M於2014.4.8.向Minnesota District Court控告HM的ION IQ Wireless Drive-Thru Audio System侵害其US 8,694,040專利。
ION IQ Wireless Drive-Thru Audio
: Remotely configurable wireless intercom system for an establishment
Date : 2011.8.22.
Issue Date : 2014.4.8.
Systems and methods
associated with an intercom system for a drive-through, quick service restaurant
facility is disclosed. Generally, a plurality of headsets is configured for
communication with a base station. A speaker is associated with the
drive-through facility is configured to be located near a menu board, and is
configured for communication with the base station. A microphone is also
configured to be located near the menu board and configured for communication
with the base station. A plurality of parameters control the configuration of
the intercom system, and the base station is connectable to a wide area
communication network to enable remote adjustment of the plurality of