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PCE
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DIFF Subgroup
G01D 9/30

there being a separate recording element for each variable, e.g. multiple-pen recorder

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Recording measured values > Producing one or more recordings, each recording being of the values of two or more different variables > there being a separate recording element for each variable, e.g. multiple-pen recorder

CPC:

Recording measured values > Producing one or more recordings, each recording being of the values of two or more different variables (G01D9/38, G01D9/40 take precedence) > there being a separate recording element for each variable, e.g. multiple-pen recorder

No child classifications to compare. This is a leaf node in both IPC and CPC.