(under subclass 307) Subject matter comprising a generally disk-shaped body designed to pass through and cooperate with a buttonhole or loop to produce securement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
90.1+, for buttons utilized as articles combined with a fastener for securing the article to another configuration.
342.1, for clasp* and button fasteners.
367.1, for pin and button fasteners.
378.1, for hook and button fasteners.
379.1, for combined diverse multipart fasteners, one of which is a button.