An extended Universal-Serial-Bus (USB) connector plug and socket each have a pin substrate with one surface that supports the four metal contact pins for the standard USB interface. An extension of the pin substrate carries another 8 extension metal contact pins that mate when both the connector plug...http://www.google.de/patents/US20050059301?utm_source=gb-gplus-sharePatent US20050059301 - Dual-Personality Extended-USB Plug and Receptacle with PCI-Express or Serial-AT-Attachment Extensions
