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 |
| 7451984 | Gift exchange game Generally described, embodiments of the present invention provide novel methods for distributing gifts to participants of a game. In some embodiments, dice are used to determine which participants receive gifts. Some embodiments include provisions for allowing parti... | 11/18/2008 |