US PATENT SUBCLASS 368 / 291
.~.~ 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}
291.~.~ Waterproofing {1}
292  DF  .~.~.~> Noncircular-type case

DEFINITION

Classification: 368/291

Waterproofing:

(under subclass 286) Subject matter including means to render the case impervious to water.

SEE OR SEARCH THIS CLASS, SUBCLASS:

289+, for timepiece case crown or stem waterproofing.