DIFF Subgroup
G06K 7/02 by pneumatic or hydraulic means, e.g. sensing punched holes with compressed air; by sonic means
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Methods or arrangements for sensing record carriers > by pneumatic or hydraulic means, e.g. sensing punched holes with compressed air; by sonic means
CPC:
Methods or arrangements for sensing record carriers, (methods or arrangements for marking the record carrier in digital fashion G06K1/00; pattern recognition G06F18/00; arrangements for image or video recognition or understanding G06V10/00; character recognition, recognising digital ink or document-oriented image-based pattern recognition G06V30/00) > by pneumatic or hydraulic means, e.g. sensing punched holes with compressed air; by sonic means
No child classifications to compare. This is a leaf node in both IPC and CPC.