| Patents for G04B 21 - Indicating the time by acoustic means (423) |
|---|
| 12/10/1986 | CN86200194U Mechanical time-giving clock |
| 11/12/1986 | CN85203609U Chronopher and automatic stove port-closing unit for pressure cooker |
| 01/28/1986 | CA1199801A1 Countdown timer |
| 01/15/1986 | EP0167699A1 Gong striking clock |
| 08/01/1985 | WO1985003363A1 Clock with gong mechanism |
| 04/02/1985 | US4508456 Striking clock with device for disconnecting the striking mechanism |
| 12/11/1984 | US4488272 Musical door chime preferably also combined with a clock for annunciating the time |
| 08/21/1984 | US4466744 Striking clock including device for selectively and/or temporarily preventing the gong or bell from being struck |
| 06/27/1984 | EP0111671A1 Clock with an alarm and striking mechanism |
| 04/24/1984 | US4444514 Device to permit reproducing or player pianos to serve as musical clocks |
| 12/27/1983 | US4422777 Time correcting device for time signalling timepiece |
| 11/15/1983 | US4414877 Musical door chime preferably also combined with a clock for annunciating the time |
| 11/09/1982 | US4358838 Electronic timepiece with a time striking device |
| 09/14/1982 | US4349899 Music box having time-sounding function |
| 04/20/1982 | US4326276 Musical door chime preferably also combined with a clock for annunciating the time |
| 01/27/1981 | US4247933 Time striking device for timepiece |
| 11/18/1980 | US4234945 Electronic timepiece with hourly strike mechanism |
| 10/14/1980 | US4228533 Autonomous pendulum mechanism for clockworks |
| 07/01/1980 | US4209968 Clock chime with shutoff |
| 05/13/1980 | US4202165 Bellowless cuckoo clock |
| 06/20/1978 | US4095409 Chiming mechanism |
| 09/27/1977 | US4050231 Bicentennial eagle clock |
| 07/19/1977 | US4036005 Clock with hour and quarter hour striking mechanism |