Appeal No. 1998-0147
Application 08/446,278
to sell the entire replay device (just as with compact discs
and DVDs), which means they can be sold more cheaply, and
the memory can be moved from machine to machine. On the
other hand, one of ordinary skill would have appreciated
that memory could be built-in (integral) if these
characteristics were not needed, as in the case of laptop
computer. Thus, although Kramer does not suggest a built-in
memory, it would have been obvious to one of ordinary skill
in the art to build the memory of Kramer into the replay
device to save space (because a separate housing and
connectors are not needed if the memory is built in) and
reduce the overall cost of the assembly (because a separate
housing and connectors are not required, a unitary device
would be cheaper to construct).
Kramer discloses that if the replay unit is used with
headphones and batteries, the entire system can be portable
(col. 6, lines 6-10). Thus, Kramer expressly discloses the
use of a battery operating as a power supply, as recited in
claim 46-48 and 50. Since an amplifier is used with
headphones in Kramer (col. 5, lines 64-65), we find that a
portable replay unit in Kramer would have an amplifier, as
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