US PATENT SUBCLASS 968 / 299
.~.~ The cover or the bottom can slide or turn with a spring action [G04B 37/00B5]

Current as of: June, 1999
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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}
295  DD  .~ For pocket watches and wrist watches [G04B 37/00B] {6}
299.~.~ The cover or the bottom can slide or turn with a spring action [G04B 37/00B5]