G04C - Electromechanical clocks or watches

More topics under "G04C - Electromechanical clocks or watches" (11,277)
G04C 1 - Winding mechanical clocks electrically (105)
G04C 10 - Arrangements of electric power supplies in time-pieces (1,992)
G04C 11 - Synchronisation of independently-driven clocks (586)
G04C 13 - Driving mechanisms for clocks by master clocks (402)
G04C 15 - Clocks driven by synchronous motors (46)
G04C 17 - Indicating the time optically by electric means (951)
G04C 19 - Producing optical time signals at prefixed times by electric means (241)
G04C 21 - Producing acoustic time signals by electrical means (1,026)
G04C 23 - Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals (976)
G04C 3 - Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (4,122)
G04C 5 - Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements (44)
G04C 9 - Electrically-actuated devices for setting the time-indicating means (776)
G04C 99 - Subject matter not provided for in other groups of this subclass (10)

Patents for G04C - Electromechanical clocks or watches (20)
11/2012
11/13/2012	CA2487972C Watch with hidden compartment
07/2012
07/11/2012	EP1509818B1 Watch with hidden compartment
08/2009
08/05/2009	CN100524100C Watch with hidden compartment
03/2008
03/12/2008	EP1897066A1 Communication method of access control system
12/2006
12/28/2006	WO2006136662A1 Communication method of access control system
09/2005
09/07/2005	CN1666157A Watch with hidden compartment
03/2005
03/02/2005	EP1509818A2 Watch with hidden compartment
09/2004
09/22/2004	CN1167984C Device for input or output data of portable article like clock
07/2004
07/15/2004	WO2003102702A3 Watch with hidden compartment
12/2003
12/11/2003	WO2003102702A2 Watch with hidden compartment
11/2003
11/05/2003	CN1127003C Clock movement with time zone display
10/2003
10/08/2003	CN1123807C Electronic clock supplied by generator driven by mechanical power source
05/2002
05/22/2002	CN1350214A Clock movement with time zone display
10/2001
10/10/2001	CN1316680A Device for input or output data of portable article like clock
09/2001
09/17/2001	CA2340818A1 Means for loading or extracting data from a portable object, such as, in particular, a timepiece
09/2000
09/05/2000	US6113259 Electronic timepiece supplied by a generator driven by a mechanical power source
01/2000
01/05/2000	CN2357351Y Hand digital double displaying timer
11/1998
11/04/1998	CN1197943A Electronic timepiece supplied by generator driven by mechanical power source
12/1993
12/15/1993	CN1023172C Multipolar stepping motor
03/1990
03/21/1990	CN1040715A Multipolar stepping motor