Appeal No. 2003-1632
Application 09/173,991
the buzzer 324, the display 318 and the LEDs 320, 322 in figure 3
and figure 3A of the in-vehicle unit clearly provide the means
for the overall system environment to communicate this and
interact with the user. The discussion at column 12, beginning
at line 47, relates to the human interface provided by these
named elements to additionally provide acceptability of the
payment with the green LED indication and nonacceptable payment
with respect to the illumination of the red LED in addition to
similar types of yes/no go/stop status
indications) and an audible output buzzer 324
(e.g., to audibly interrupt the user’s
attention when urgent user control is needed
or to audibly indicate success, failure or
key click sounds). The primary function of
the buzzer is to provide audio feedback
without the necessity of reading the LCD
display and/or LED’s. [Chaum, column 12,
lines 50 through 57.]
Thus, we do not agree with appellants’ views in the
Brief and Reply Brief that these features do not provide the
means with which the overall systems and subsystems in Chaum
communicate with the user.
The discussion at the paragraph bridging columns 15
and 16 and the showings in figures 5 and 3D relate to the
function of the link ASIC 308 associated with the IVU indicating
the bidirectionality of downlink and uplink communications.
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