# US 7,744,389 B1 · Communication with a multi-contact pad having a USB application > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,389 B1 - Document ID: US7744389B1 - Status: Granted - Kind: B1 - Application number: 12/535,241 - Filed: 2009-08-04 - Granted: 2010-06-29 - Earliest claimed: 2009-08-04 - Assignees: Lenovo (Singapore) Pte. Ltd. - Inventors: Julie Anne Morris; Michael Thano Matthews; Jennifer Greenwood Zawacki - Web page: https://patentgrep.com/patent/US7744389B1 ## CPC - H01R 27/02: for simultaneous co-operation with two or more {dissimilar} counterparts - H01R 13/66: Structural association with built-in electrical component (coupling devices having concentrically or coaxially-arranged contacts H01R24/38) - H01R 31/065: {with built-in electric apparatus} - Y10T 29/49004: including measuring or testing of device or component part - Y10T 29/49169: Assembling electrical component directly to terminal or elongated conductor - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Apparatus for making an electrical connection in a system requiring four electrical connections, including an electrical connection pad having an array of four types of electrically conductive contacts, all conductive contacts of a given type being electrically connected to all other conductive contacts of the same type; and an arrangement for providing electrical connections to conductive contacts on the pads, the arrangement having electrically conductive pins for making contact with the conductive contacts, wherein the types of electrically conductive contacts include two contacts for power and two separate contacts for signals. The pins may be arranged at corners of a first square and a second square, with the first square being rotated by forty-five degrees with respect to the second square, and a pin located at a common center of both squares. A method of operation of the apparatus, and various applications and configurations for its use. ## Claims ### Claim 1 An arrangement for making electrical connections, comprising electrically conductive contacts arranged at corners of a first square and corners of a second square, said first square being rotated by substantially forty five degrees with respect to said second square, said squares having a common center, and an electrically conductive contact disposed at said common center. ### Claim 2 (depends on 1) The arrangement of claim 1, wherein said electrically conductive contacts are electrically conductive pins. ### Claim 3 (depends on 1) An arrangement of claim 1, in combination with an electrical connection pad having an array of four types of electrically conductive contacts, all conductive contacts of a given type being electrically connected to all other conductive contacts of the same type; said electrically conductive contacts of said pad being sized, shaped and positioned to make electrical contact with selected one of said electrically conductive contacts of said arrangement. ### Claim 4 (depends on 3) The combination of claim 3, wherein said arrangement is disposed on an outside surface of a portable electronic device so that said conductive pins contact said conductive contacts of said electrical connection pad to establish electrical connections to said portable device when said portion of said outside surface of said portable electronic device is placed on said pad. ### Claim 5 (depends on 3) The combination of claim 3, further comprising circuitry configured to operate with said electrical connection pad so that said electrical connection pad has characteristics of a universal serial bus hub. ### Claim 6 (depends on 5) The combination of claim 5, wherein said electrical connection pad includes at least one universal serial bus connection port to which a universal serial bus device is connected for electrical connections to be made with said universal serial bus device. ### Claim 7 (depends on 6) The combination of claim 6, further comprising circuitry for determining which of said electrical contacts of said arrangement is in contact with conductive contacts for electrical power, and which of said electrical contacts of said arrangement is in contact with conductive contacts for signal. ### Claim 8 (depends on 3) The combination of claim 3, wherein said electrical connection pad further comprises at least one universal serial bus cable port for connection to a universal serial bus port of a computer. ### Claim 9 (depends on 3) The combination of claim 3, wherein said types of electrically conductive contacts comprise two contacts for power and two separate contacts for signals. ### Claim 10 (depends on 9) The combination of claim 9, wherein said arrangement is configured to be disposed on an underside surface of a portable computer, and used to provide temporary electrical connections to said portable computer, further comprising a second said arrangement for a second portable device, said electrical connection pad providing electrical connections between said portable computer and said second arrangement. ### Claim 11 (depends on 1) The arrangement of claim 1, configured to provide electrical connections for apparatus utilizing a standard selected from the group consisting of four pin IEEE 1394, telephone, USB, and Ethernet® RJ45 signal connections. ### Claim 12 (depends on 1) The arrangement of claim 1, wherein said arrangement is disposed on an underside surface of a portable computer, and used to provide temporary electrical connections to said portable computer. ### Claim 13 (depends on 1) The arrangement of claim 1, wherein two of said electrically conductive contacts are for power and two of said electrically conductive contacts are for signals. ### Claim 14 (depends on 13) The arrangement of claim 13, associated with circuitry for determining which of said electrically conductive contacts of said arrangement is in contact with electrical power, and which of said electrically conductive contacts of said arrangement is in contact with signals. ### Claim 15 (depends on 1) The arrangement of claim 1, further comprising at least one additional said arrangement, each said arrangement being for connection with an electronic device, said arrangements being used to facilitate contact between said electronic devices.