| Patents for G04B 21 - Indicating the time by acoustic means (423) |
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| 06/20/2007 | EP1797482A2 Watch control device |
| 06/20/2007 | CN1983082A Timepiece including a single-pawl striking mechanism |
| 06/20/2007 | CN1983081A Timepiece including a striking mechanism with instant triggering |
| 06/14/2007 | US20070133356 Alarm system with a plurality of interactive alarm units |
| 04/11/2007 | CN2888502Y Turnover type clock |
| 04/11/2007 | CN1945046A Governor and a power generating device and an apparatus using the governor |
| 04/04/2007 | EP1770453A1 Timepiece incorporating a double striking mechanism |
| 03/07/2007 | EP1760554A1 Timepiece incorporating a striking mechanism |
| 03/07/2007 | EP1760553A1 Timepiece with Grand Strike |
| 03/07/2007 | EP1760552A1 Timepiece with Grand Strike |
| 03/07/2007 | EP1760551A1 Timepiece with Grand Strike |
| 03/07/2007 | EP1760550A1 Timepiece with Grand Strike |
| 03/07/2007 | EP1760549A1 Gong for a striking mechanism in a timepiece |
| 03/07/2007 | EP1760548A1 Timepiece incorporating a mechanism for the indication of time by a striking mechanism |
| 03/07/2007 | EP1760545A1 Timepiece with a striking mechanism |
| 03/07/2007 | EP1760544A1 Device for displaying power reserve |
| 03/06/2007 | US7187625 Shofar timekeeping apparatus and method |
| 02/21/2007 | CN2872437Y Intelligent driver of clock loundspeaker |
| 02/01/2007 | US20070025189 Electronic apparatus and method for implementing an intelligent wake mode |
| 01/03/2007 | EP1739509A1 Timepiece comprising a device for actuating a striking mechanism, provided with an elastic transmission element |
| 10/26/2006 | WO2006111262A1 Mechanism for generating at least on type of sonority |
| 10/25/2006 | EP1715393A1 Mechanism generating at least a tone |
| 10/25/2006 | CN2831191Y Two-asking time reporting mechanism of clock |
| 10/24/2006 | US7126882 Cuckoo clock having scissoring extension ARM and actuating mechanisms |
| 10/19/2006 | WO2006037739A3 Watch control device |
| 10/05/2006 | WO2006103267A1 Timepiece comprising a minute repeater mechanism |
| 10/04/2006 | EP1708050A1 Timepiece with a minute-repeater mechanism |
| 09/27/2006 | EP1705536A1 Timepiece with a striking mechanism |
| 09/12/2006 | US7106662 Thermal alarm clock |
| 06/21/2006 | EP1672442A1 Instrument for measuring time intervals comprising a striking mechanism |
| 06/21/2006 | EP1672440A2 Alarm device for timepieces |
| 11/30/2005 | EP1599765A2 Movement |
| 11/22/2005 | US6967902 Voice feedback timer system |
| 10/19/2005 | CN2735403Y A mechanical clock movement |
| 09/14/2005 | EP1574917A2 Minute-repeater timepiece |
| 02/10/2005 | WO2004079460A3 Movement |
| 02/02/2005 | CN1187661C Device capable immersing and containing sound transducer |
| 11/16/2004 | US6819635 Portable clock with chime signal |
| 09/16/2004 | WO2004079460A2 Movement |
| 06/16/2004 | EP1429214A1 Timepiece provided with alarm mechanism |
| 05/06/2004 | EP1416342A1 Timepiece with an alarm provided with surprise-piece lifting lever |
| 04/14/2004 | EP1408381A1 Centrifugal governor of a striking mechanism, particularly in a timepiece |
| 04/06/2004 | US6717888 Timer actuated by a burning incense stick |
| 12/31/2003 | CN2596393Y Spring driving bird crying time telling mechanism |
| 12/04/2003 | US20030223314 Portable clock with chime signal |
| 11/20/2003 | US20030214884 Timer actuated by a burning incense stick |
| 08/20/2003 | CN1118728C Striking device of clock and watch |
| 12/18/2002 | CN2526878Y Timing strikig controlling mechanism for movement of mechanical clock |
| 07/24/2002 | CN2502302Y Stroke controlling mechanism for mechanical lock movement |
| 04/17/2001 | US6219304 Device capable of being submerged and including an acoustic transducer |
| 11/15/2000 | CN1273379A Belling device of clock |
| 11/01/2000 | CN2404139Y Quartz mechanical clock and watch |
| 01/26/2000 | CN2360867Y Clock |
| 12/22/1999 | CN2355345Y Alarm clock with separate alarm from clock |
| 10/05/1999 | US5962796 Disc music box |
| 09/28/1999 | US5959527 Time triggered chime |
| 09/08/1999 | EP0940734A1 Striking clock with device for disconnecting the striking mechanism |
| 08/04/1999 | CN2331986Y Inserted board type song-choosing device |
| 06/23/1999 | CN2325801Y Pre-alarming device for mechanical alarming clock |
| 06/16/1999 | CN1219694A Timer with sounder |
| 04/28/1999 | CN1214965A Device capable immersing and containing sound transducer |
| 04/21/1999 | CN2315579Y Squelching device for Liaoye lock |
| 02/17/1999 | CN1208184A Multifunctional pointer-type time-controlling clock |
| 01/26/1999 | US5864519 Music box timepiece |
| 10/20/1998 | US5825721 Timepiece with music box |
| 01/29/1998 | DE19629580A1 Wall clock |
| 08/13/1997 | CN2259074Y Voice time signal badge |
| 05/28/1997 | CN2255057Y Music apparatus of old type time-piece |
| 10/01/1996 | US5561413 Sound generator |
| 08/21/1996 | CN2233595Y Striking device for mechanical clock |
| 04/25/1996 | DE4437611A1 Analogue wrist watch for small children |
| 03/13/1996 | CN2222369Y Mechanical clock alarming device |
| 09/20/1995 | CN2208240Y Chronopher of mechanical timer |
| 09/08/1995 | WO1995024002A1 Timepiece with visible moving elements |
| 02/08/1995 | CN2189322Y Hammer for striking of alarm clock |
| 05/03/1994 | US5309413 Method, integrated circuit, mechanical analog clock movement and completed assembly for a talking analog clock |
| 02/08/1994 | US5285429 Sound-producing attachment for a clock pendulum |
| 01/05/1994 | DE4220573A1 Striking and ringing indicator esp. for Black Forest clock - has striking and ringing switching-off lever carrier arranged in dial plane |
| 01/14/1993 | DE4120886A1 Repeater watch with chime mechanism - has drive wheel attached to centrifugal governor via grip-roller coupling with free-wheeling and regulating gear-wheels |
| 04/15/1992 | CN2101898U Chronopher with imitating cuckoo sound for quartz clock |
| 10/17/1991 | DE4012058A1 Repeating clock mechanism with spring drive |
| 10/16/1991 | EP0451341A1 Repeating watch |
| 10/16/1991 | EP0451340A1 Repeating watch |
| 10/16/1991 | EP0451339A1 Repeating watch |
| 10/16/1991 | EP0451338A1 Repeating watch |
| 10/16/1991 | EP0451337A1 Repeating watch |
| 10/16/1991 | EP0451336A1 Mainspring assembly |
| 10/16/1991 | EP0451335A1 Strike-hammer driving device |
| 10/16/1991 | EP0451334A1 Repeating watch |
| 07/10/1991 | CN2080683U Electro-mechanic squeaking device for quartz clock |
| 03/27/1991 | CN2074025U Mechanical timing clock with bird singing |
| 12/05/1990 | EP0400205A1 Assembly comprising a vibratory element for producing striking sounds in a timepiece |
| 07/10/1990 | US4941137 Timepiece with mobile decorations |
| 08/30/1989 | CN2043768U Double sound time mechanism for clock |
| 02/07/1989 | US4803673 Striking mechanism clock with switchable lifting stud cylinder |
| 02/23/1988 | US4727526 Alarm on-off mechanism for alarm watch |
| 01/21/1988 | DE3623769A1 Clockwork mechanism for clocks with a striking mechanism |
| 08/12/1987 | CN86205323U Unit of auto-stopping striking hours at night fitted on mechanical striking clock |
| 07/28/1987 | CA1224631A1 Assembly for fastening the clockwork and the gongblock of a clock in a housing |
| 05/12/1987 | US4664532 Assembly for fastening the clockwork and the gongblock of a clock in a housing |