US PATENT SUBCLASS 968 / 29-- .~ Removably mounted keys or the like (special tools for clockworks with difficult access, universal keys for watches with a small crown subclass 27; keys with means preventing overwinding subclass 36; protecting means preventing overwinding subclass 38) [G04B 3/02]

US PATENT SUBCLASS 968 / 29
.~ Removably mounted keys or the like (special tools for clockworks with difficult access, universal keys for watches with a small crown subclass 27; keys with means preventing overwinding subclass 36; protecting means preventing overwinding subclass 38) [G04B 3/02]

968 /	HD	HOROLOGY

23	DD	NORMAL WINDING OF CLOCKWORKS BY HAND OR MECHANICALLY; WINDING UP SEVERAL MAINSPRINGS OR DRIVING WEIGHTS SIMULTANEOUSLY (see note attached to this subclass) {10}
29		.~ Removably mounted keys or the like (special tools for clockworks with difficult access, universal keys for watches with a small crown subclass 27; keys with means preventing overwinding subclass 36; protecting means preventing overwinding subclass 38) [G04B 3/02]