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 |
| 6279186 | Multifunctional utility tool A utility tool comprises a plurality of separate tools or implements mounted within a single light-weight housing. The tool includes a retractable knife blade and a retractable saw blade which are extendable from one end thereof each under control of a pa... | 08/28/2001 |