Appeal No. 1997-2690
Application No. 08/532,040
information and an additional code pattern to disambiguate
between data codes that are rotated 0E and 180E. Both
patterns are spatially distributed in nominal accordance with
a predetermined spatial formatting rule. The additional code
pattern is formed of an asymmetric digital code sequence.
Claim 1 is illustrative of the claimed invention, and it reads
as follows:
1. An optically readable record for storing encoded digital
information; said record comprising
a recording medium;
a self-clocking data code pattern for encoding said
information; said data code pattern being composed of glyphs
that are written in a two dimensional code field on said
recording medium on centers that are spatially distributed in
nominal accordance with a predetermined spatial formatting
rule; said glyphs being defined by respective symbols that are
selected from a finite set of optically discriminable symbols
to encode said digital information; and
at least one additional code pattern that is written on
linearly aligned centers on said recording medium in nominal
accordance with said spatial formatting rule, said additional
code pattern being composed of glyphs which are selected from
said finite set of symbols in accordance with a predetermined,
asymmetric digital code sequence, whereby said asymmetric code
sequence disambiguates between data codes that are rotated 0E
and 180E, even though said data code pattern and said
additional code pattern are composed of glyphs that provide a
substantially uniform visual appearance.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
2
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