| 968 / | HD | HOROLOGY |
| 217 | DD | INDICATING BY ACOUSTIC MEANS (at preselected times subclass 229; by electroacoustic means or electroacoustic time indicating subclass 582; time indicating by means other than acoustically, or combined means subclass 243; time indicating by visual means subclass 139; acoustic signalling arrangements G08B 3/00) [G04B 21/00] {2} |
| 219 | DD | .~ Regular striking mechanisms giving the full hour, half hour, or quarter hour [G04B 21/02] {8} |
| 225 | | .~.~ Sounding bodies; whistles; musical apparatus (with electroacoustical transmitters subclass 580; sounding arrangements in alarm clocks subclass 237; cases with arrangements for enhancing sound production subclass 303; carillons and sounding boards G10F 1/08, 1/10, G10D 13/08) [G04B 21/08] |