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 |
| 4173043 | Wind resistant floatable pool cover and manufacture thereof A floatable cover for use with an outdoor pool containing liquid which substantially prevents liquid evaporation and heat loss. The cover edges include a channel which extends along the edges, and means for admitting liquid into the channel, such as orifi... | 11/06/1979 |