(under subclass 51) Devices having a plurality of separate plug, socket, or other coupling parts for cooperation with a like number of complementary coupling parts.
(1) Note. This subclass includes, for example, (a) devices having a plug at one end and a socket at the other, sometimes known as adapters, (b) lamp sockets having one or more plug receptacles combined therewith, and (c) multiple lamp sockets, sometimes known as cluster lamp sockets.
SEE OR SEARCH CLASS
439, Electrical Connectors,
638+, for two or more plural contact coupling part connectors combined in one integral unit.