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 |
| 6954142 | Surveillance system and method A sensor system in which a sensor suite has a locally located field sensing unit (FSU) that converts and evaluates sensor information using sensor fusion algorithms and is thereby able to send qualitative low-bandwidth, low power usage signals to a remote command po... | 10/11/2005 |