US PATENT SUBCLASS 968 / 338-- .~.~ Means affording hermetic sealing inside the case, e.g., protective case for the clockwork against dust, the escapement being in a hermetically sealed case, etc. (case for watch pieces subclass 305; synchronous motor lubrication subclass 563) [G04B 37/08P]

US PATENT SUBCLASS 968 / 338
.~.~ Means affording hermetic sealing inside the case, e.g., protective case for the clockwork against dust, the escapement being in a hermetically sealed case, etc. (case for watch pieces subclass 305; synchronous motor lubrication subclass 563) [G04B 37/08P]

968 /	HD	HOROLOGY

294	DD	CASES (cases with a special shape subclass 390; ornamentation of the case subclass 395; cartridges A45C 11/00-11/38) [G04B 37/00] {13}
327	DD	.~ Hermetic sealing of openings, joints, passages, or slits (covers or protecting devices which can be directly removed, or by sliding or turning subclass 300; hermetic sealing of watch or crystal with special pieces subclass 373; hermetically-sealed electrical switches H01H 23/06) [G04B 37/08] {6}
338		.~.~ Means affording hermetic sealing inside the case, e.g., protective case for the clockwork against dust, the escapement being in a hermetically sealed case, etc. (case for watch pieces subclass 305; synchronous motor lubrication subclass 563) [G04B 37/08P]