US PATENT SUBCLASS 368 / 289
.~.~.~ By waterproofing

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

276  DF  CASES {17}
286  DF  .~ With protection means {4}
288  DF  .~.~ For crown or stem {1}
289.~.~.~ By waterproofing {1}
290  DF  .~.~.~.~> Push-button stem type

DEFINITION

Classification: 368/289

By waterproofing:

(under subclass 288) Subject matter including means to render the crown or stem impervious to water.

SEE OR SEARCH THIS CLASS, SUBCLASS:

291+, for timepiece case waterproofing, per se.