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 |
| 3982672 | Applicators of granular materials A machine, for delivery of metered quantities of granular material, comprising a hopper, a discharge outlet, and a metering device in the lower regions of the hopper for conveying measured quantities of granular material between said hopper and said disch... | 09/28/1976 |