CPC Class Codes
B41J 2/17513
Inner structure
B41J 2/17523
Ink connection
B41J 2/17546
electronically
B41J 3/51
the printed and recorded in...
C09D 11/328
characterised by dyes
C09D 11/50
Sympathetic, colour changin...
G06F 3/0321
by optically sensing the ab...
G06F 3/03542
Light pens for emitting or ...
G06F 3/03545
Pens or stylus
G06V 30/10
Character recognition
G06V 30/1444
Selective acquisition, loca...
H04N 1/00358
Type of the scanned marks
H04N 1/00376
Means for identifying a mar...
H04N 1/32101
Display, printing, storage ...
H04N 1/32128
attached to the image data,...
H04N 1/32133
on the same paper sheet, e....
H04N 1/32144
embedded in the image data,...
H04N 1/32771
in response to a request, e...
H04N 1/32778
using a mark-sheet or machi...
H04N 2201/3205
of identification informati...
H04N 2201/3207 :
of an address
H04N 2201/3226 :
of identification informati...
H04N 2201/3242 :
of processing required or p...
H04N 2201/3269 :
of machine readable codes o...
H04N 2201/327 :
which are undetectable to t...
H04N 2201/3271 :
Printing or stamping
H04N 2201/3278 :
Transmission
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