G04C21/18 - CPC Classification Index

ClassID:

179499 ⎘

G04C21/18 - CPC Classification

Classification description:

Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by mechanically unlocking an electromechanical vibrator, e.g. actuated by the leakage flux of the electric driving means

Sub-classes:

G04C21/185 » {provided with means for sheeting off or temporarity stopping the signal} 0

Recent Application in this class:

20250271813

2025-08-28

INTERNAL CHIME MECHANISM FOR AN ALARM CLOCK

20120269046

2012-10-25

VIBRATING ALARM AND METHOD OF WAKING