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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7970993 | Rotating parity redundant array of independent disk and method for storing parity the same A rotating parity redundant array of independent disk (RAID) and a method for storing parity of the same are provided. The rotating parity RAID comprises a first˜a third disk. The first disk has A1˜Am blocks for storing A1˜Am... | 06/28/2011 |
| 7672296 | Real-time communications system of high communications quality and media terminal apparatus A VoIP system has plural CPE units connected to an IP network as parties to be connected with each other. Each CPE unit is composed of a VoIP-IF circuit and an audio codec circuit. The VoIP-IF circuit executes at least one of the coding process to the first audio fr... | 03/02/2010 |
| 7671697 | High-isolation switching device for millimeter-wave band control circuit Provided is a high-isolation switching device for a millimeter-wave band control circuit. By optimizing a cell structure to improve the isolation of an off-state without deteriorating the insertion loss of an on-state, it is possible to implement a high-isolation sw... | 03/02/2010 |
| 7663481 | Method for sensor node roaming in wireless sensor network environment Provided is a method for mobile sensor node roaming in an environment of first and second adjacent wireless sensor networks having a plurality of sensor nodes. The method includes the steps of: periodically performing energy detection scan and active scan operations... | 02/16/2010 |
| 7662529 | Electrophotographic photoconductor An electrophotographic photoconductor in which generation of a ghost phenomenon caused by exposure is avoided and potential change before and after continuous printings is insignificant. A functionally separated type electrophotographic photoconductor includes at le... | 02/16/2010 |
| 7662245 | Steering rack comprising steel bar with rack teeth A steel bar for a steering rack that contains 0.50 to 0.60% by mass of C, 0.05 to 0.5% by mass of Si, 0.2 to 1.5% by mass of Mn, 0.0005 to 0.003% by mass of B, 0.005 to 0.05% by mass of Ti, 0.0005 to 0.1% by mass of Al, and 0.002 to 0.02% by mass of N is provided. G... | 02/16/2010 |
| 6870248 | Semiconductor chip with external connecting terminal A semiconductor device having a semiconductor chip and protective resin covering a sidewall of the semiconductor chip and having a surface formed so as to be flush with an inactive surface of the semiconductor chip. The semiconductor chip may be joined to a wiring b... | 03/22/2005 |
