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 |
| 4754125 | Time-tape calculator Apparatus for use in correlating actual tape play times, tape length, or predetermined tape program locations with tape-spool revolution values provided by a tape-revolution index counter in a tape machine. The calculator has a lower circular base plate a... | 06/28/1988 |