Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals (if restricted to producing acoustic time signals by electrical means G04C21/00)

Child Classifications

Navigate with arrow keys, Enter to open

• G04C 23/02 Constructional details
• G04C 23/14 Mechanisms continuously running to relate the operation(s) to the time of day
• G04C 23/38 Mechanisms measuring a chosen time interval independently of the time of day at which interval starts