Appeal No. 2003-0506 Page 9
Application No. 09/264,766
however, that its "invention can be embodied in other specific forms. . . ." Col. 8, ll. 63-
64. We find that the omission of detail and the recognition of alternative embodiments
invites the use of known techniques of channel identification.
Ayerst discloses a known technique of channel identification. Specifically,
"Ayerst describes using a vector on a first channel to notify a user terminal that a long
message may be received on a second channel." (Appeal Br. at 9.) The reference
explains that once a recipient radio "decodes a starting position and length of [the] long
message," col. 18, ll. 31-32, it "switches to the low power mode at the end of the vector
packet to conserve battery life." Id. at ll. 34-35. The radio "switches to the normal
power mode before the beginning of the long message," id. at ll. 36-37, and switching
back "to low power mode at the end of the long message to conserve battery life."
Id. at ll. 42-43. We agree with the examiner's finding that employing Ayerst's technique
of channel identification in Dent's radio communication system so that a mobile terminal
would have identified a second channel via an indication sent on the first channel would
have saved that terminal from having to scan plural channels and would have
conserved battery power. (Examiner's Answer at 4.) Because Dent invites the use of
known techniques of channel identification, and Ayerst discloses a technique that saves
scanning and conserves power, we are persuaded that the references would have
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