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PCE
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DIFF Subgroup
H04R 19/10

signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Introduced: September 1968

Title

Titles differ between systems:

IPC: signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously

CPC: signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Full Title

Full titles differ between systems:

IPC:

Electrostatic transducers > Gramophone pick-ups using a stylus; Recorders using a stylus > signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously

CPC:

Electrostatic transducers > Gramophone pick-ups using a stylus; Recorders using a stylus (H04R19/01 takes precedence) > signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

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