(under subclass 639) Subject matter wherein the vessel has an opening in the vessel bottom wherein the water in the vessel can flow out under the action of gravity.
(1) Note. Here are plural sinks. lavatories, tubs, and basins with drains.
SEE OR SEARCH THIS CLASS, SUBCLASS:
539+, for plural bathtubs.
549, for converting a sink or tub into plural receptacles.
643+, for a wash receptacle with a support.
650+, for a washbasin with a drain, sink, lavatory, or washtub with a drain.
663, for a wash receptacle, bathtub, and flush closet.
