US PATENT SUBCLASS 968 / 443
.~ Protection against overwinding (in mechanical clocks or watches subclasses 16, 36, 38, 66, and 71) [G04C 1/10]


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968 /   HD   HOROLOGY

426  DD  WINDING MECHANICAL CLOCKS ELECTRICALLY (winding mechanically subclass 23; electrical winding of spring-driven arrangements for gramophones G11B 19/20) [G04C 1/00] {5}
443.~ Protection against overwinding (in mechanical clocks or watches subclasses 16, 36, 38, 66, and 71) [G04C 1/10] {2}
444  DD  .~.~> Of the spring [G04C 1/12]
445  DD  .~.~> Of the weights [G04C 1/14]