Appeal No. 1999-2714
Application No. 08/504,562
reciting an offset, specifically, appellant’s groups 2, 3, and 4 (claims 69-71, 75-77, 92-95,
115, 116, 123, 72-74, 78-81, 82, 83, 85 and 86.)
With respect to the generation of a second window segment token for each
changed window, the examiner maintains that Queen teaches the creation of the second
window segment by adjusting the base window segment token to reflect the deletion of
the first character of the base window segment and the addition of the next character in
the file forming the second window segment. (See answer at page 14.) We disagree
with the examiner’s interpretation of Queen at column 6 which is relied upon by the
examiner. Claim 84 states:
A method for creating a second window segment token from a base
window segment token, said method comprising creating a base window
segment in a computer memory by reading a segment of a file in a
computer memory, said segment in said file being of the same size as said
base window segment, calculating an exclusive-or signature that is an
exclusive-or representation of the characters of said base window segment
of the file to create a base window segment token, creating said second
window segment which comprises all characters of said base window
segment except the first character of said base window segment and
comprises the next character in said file after said segment in said file
which was read to form the base window segment by reading said next
character in said file, and creating a second window segment token for
said second window segment by adjusting the base window segment token
to reflect the deletion of the first character of said base window segment
and the addition of said next character in said file in forming the second
window segment.
While Queen finds identity between the two by a character by character
comparison and the combination of Metzner and Queen would similarly require a move
13
Page: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Next
Last modified: November 3, 2007