The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 7363947 | Appliance and receptacle for receiving a Universal Serial Bus (USB) plug in two orientations A reversible receptacle for receiving a USB plug, including a first set of four electrical contact regions and a second set of four electrical contact regions, the contact regions configured such that in a first coupling orientation of the plug with the reversible r... | 04/29/2008 |