| Patents for G04G 13 - Producing acoustic time signals (1,738) |
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| 07/07/1993 | CN2137796Y Liquid crystal alarm clock with time-giving function |
| 06/23/1993 | EP0547250A1 Timepiece equipped with silent alarm |
| 05/13/1993 | DE4233376C1 Alarm clock with inductive components - uses voltage peaks self induced in latter to light lamp or LED |
| 04/29/1993 | WO1993008514A1 Sound supplemented clock system |
| 04/13/1993 | US5202859 Time informing clock |
| 04/01/1993 | DE4226449A1 Clock with multiple set time indicators |
| 04/01/1993 | DE4226448A1 Clock with multiple set time indicators |
| 03/31/1993 | EP0534336A1 Clock comprising an exchangeable information carrier |
| 03/18/1993 | DE4226450A1 Clock with multiple set time indicators |
| 03/18/1993 | DE4226447A1 Clock with multiple set time indicators |
| 03/16/1993 | US5195064 Sound supplemented clock system |
| 02/23/1993 | US5189648 Alarm clock game combination |
| 02/18/1993 | WO1993003428A1 Clock with set-time input system |
| 01/21/1993 | WO1993001532A1 Timepiece equipped with silent alarm |
| 12/08/1992 | US5170159 For turning off equipment of audio/visual signals |
| 10/07/1992 | CN2118322U Contactless digital control timepiece core |
| 09/23/1992 | CN1064755A Melody alarm timepiece |
| 09/23/1992 | CN1064605A Universal automatic controller for domestic electrical equipments |
| 09/16/1992 | EP0503133A2 Clock |
| 09/16/1992 | EP0503132A2 Clock |
| 09/16/1992 | EP0502967A1 Audible time annunciator |
| 09/09/1992 | EP0502747A2 Melody alarm timepiece |
| 09/09/1992 | CN2115550U Electric triggering type quartz clock movement |
| 08/13/1992 | DE4103911A1 Alarm unit with alarm and switching-off unit - has electric sensor element for producing measurement value which differentiates according to pressure or absence of sleeper to switch-off alarm with absence |
| 08/06/1992 | DE4103016A1 EM signal generator for clock with electronic alarm - has permanent magnetic particles in base of plastics material housing and diaphragm with mound-shaped flux return bridging piece |
| 07/29/1992 | EP0496196A1 Apparatus and method for controlling electronic devices by the sleep states of a human being |
| 07/22/1992 | CN2110892U Electronic quartz multi-stage timing precontrol clock |
| 07/15/1992 | CN2110244U Computer language chronopher |
| 07/01/1992 | CN2108951U Digital clock/watch with language chronopher |
| 06/24/1992 | CN1062224A Double timed alarm quartz alarm clock |
| 06/17/1992 | EP0490666A2 Low energy animated time piece |
| 06/12/1992 | CA2057333A1 Low energy animated time piece |
| 04/22/1992 | CN2102533U Combined simulated audio electronic alarm clock |
| 04/21/1992 | US5107469 Digital low-power programmable alarm clock for use with reflectance photometer instruments and the like |
| 04/15/1992 | EP0188283B1 Recording/reproducing apparatus including synthesized voice converter |
| 04/08/1992 | CN2101272U Full automatic controller for electric bell or whistle chronopher |
| 04/07/1992 | US5101831 System for discriminating sleep state |
| 03/10/1992 | US5095468 Alarm clock |
| 02/18/1992 | US5089998 Vibrating and audible alarm clock |
| 02/05/1992 | EP0469395A2 Digital low-power programmable alarm clock for use with reflectance photometer instruments and the like |
| 01/29/1992 | CN2094761U Electronic timer |
| 01/15/1992 | CN2093411U Numeral electronic alarm clock |
| 12/12/1991 | DE4018096A1 Two=part alarm clock - has IR transmitter in radio proper sending signal to separate alarm sound generator at set time |
| 12/10/1991 | US5072429 Electronic wake up pillow |
| 11/05/1991 | US5063544 Program to alter alarm setting in a multimode alarm timepiece |
| 10/10/1991 | DE4010792A1 Radio, radio alarm clock or similar appts. - has separate tune and loudness controls for alarm, normal and sleep modes |
| 09/25/1991 | CN2085531U Multipurpose intelligent clock with special display |
| 09/19/1991 | DE4008319A1 Radio alarm clock - has slumber button maintaining preset radio volume as long as radio is switched on |
| 08/27/1991 | US5043956 Wristwatch with oscillation alarm |
| 07/24/1991 | CN2081547U Electronic self-trigger chronopher |
| 07/17/1991 | EP0437033A2 Time keeping device with vibrational alarm |
| 07/10/1991 | EP0436488A2 Sleep timer for audio/visual apparatus and method of sleep timer operation |
| 06/25/1991 | US5027409 Apparatus for electronically outputting a voice and method for outputting a voice |
| 06/25/1991 | US5027025 Flat brushless motor |
| 06/19/1991 | EP0432345A2 Alarm- or radio-clock with a circuit arrangement for their control |
| 06/11/1991 | US5023853 Electric apparatus with silent alarm |
| 05/30/1991 | WO1991008027A1 Audible time annunciator |
| 05/30/1991 | CA2069940A1 Audible time annunciator |
| 05/07/1991 | US5014317 Recording/reproducing apparatus with voice recognition function |
| 05/02/1991 | DE4100195A1 Radio alarm clock with controls for sleep and alarm functions - uses simple relay switching circuit to select required vol. automatically e.g. after quieter sleep-inducing mode alarm level |
| 04/24/1991 | EP0423277A1 Safety wrist-watch with a warning system |
| 04/16/1991 | US5008866 Alarm setting program for alarm timepiece with alternate time zone |
| 03/06/1991 | CN2072696U Electron brain time phonetics calling unit |
| 01/30/1991 | CN1048936A Pocket electronic lock for blind person |
| 01/02/1991 | EP0405853A2 Wrist watch with oscillation alarm |
| 11/15/1990 | DE3912802C1 Pocket or wrist watch e.g. for taking medicine - has commitment or appointment call transmitter activated by large operating knob |
| 10/26/1990 | WO1990013070A1 Safety wrist-watch with a warning system |
| 10/26/1990 | CA2031188A1 Safety wrist-watch with alarm |
| 10/23/1990 | US4965779 Multi-functional electronic timepiece |
| 09/19/1990 | CN2062467U Micro type chronopher |
| 08/09/1990 | DE4003686A1 Alarm call system with remote programming and selective alarm feature - uses digital transmission, earplug sound generator and remote keyboard, has data feedback, fail safe sensor and alternative coupling media |
| 06/27/1990 | CN2058768U Multifunctional electronic clock with voice time-telling and alarming functions |
| 05/02/1990 | EP0366422A2 Electronic timepiece |
| 04/24/1990 | US4920525 Quiet alarm clock |
| 04/17/1990 | US4918674 Alarm timepiece |
| 02/21/1990 | CN1039906A Electronic watch with alarm |
| 01/23/1990 | US4896308 Digital clock for giving acoustic time-indicating signals at predetermined moments |
| 01/16/1990 | US4894813 Alarm shut-off device, with a wake up signal delivering integrated circuit and a receiving and signal shaping network |
| 01/03/1990 | EP0349230A2 Alarm apparatus |
| 01/03/1990 | CN2050625U Computerized quartz clock |
| 01/02/1990 | US4891776 Electronic timepiece |
| 11/08/1989 | CN2047404U 多功能电子闹钟 Multi-functional electronic alarm clock |
| 11/08/1989 | CN2047403U Electronic timing clock |
| 11/07/1989 | US4879699 Audio output device |
| 11/02/1989 | EP0339316A2 Electronic alarm clock |
| 10/24/1989 | US4876676 Voice recognizing alarm timepiece |
| 09/05/1989 | US4864604 Electronic wristwatch having dialing tone generator |
| 08/10/1989 | DE3803387A1 Electronic timepiece |
| 04/11/1989 | US4821247 Ear-mounted alarm clock |
| 03/29/1989 | CN2035108U Warner for vehical passenger |
| 03/29/1989 | CN2035105U Sound volume light-controlled electronic time giving clock |
| 02/28/1989 | US4809192 Method for translating sentences |
| 01/10/1989 | US4796503 Amplification circuit for electronic tone generator |
| 01/04/1989 | CN2030343U Quartz clock with light-controlled chronopher |
| 12/21/1988 | EP0295456A1 Alarm interrupting means, in particular for alarm clocks or time scheduling clocks |
| 12/20/1988 | US4792789 Alarm driving signal generator |
| 11/15/1988 | US4785433 Pet watch process and circuit |
| 09/27/1988 | US4774697 Electronic timepiece including a schedule memory device |
| 09/15/1988 | DE3706629A1 Arrangement of the switching elements for an electrical signal-issuing clock, especially alarm clock |
| 09/14/1988 | CN87207935U Household multifunctional digital clock |