A modular plug-dual modular jack adaptor is disclosed. The adaptor is comprised of a two piece molded housing having a plurality of one piece uninsulated conductor members therein, which can engage directly with the contacts in other modular jacks and plugs. The conductor members are made from stamped...http://www.google.de/patents/US4438998?utm_source=gb-gplus-sharePatent US4438998 - Modular plug-dial modular jack adaptor