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 |
| 4611298 | Information storage and retrieval system and method A computer system for electronically storing and retrieving data files which have been linked together to form a hierarchal information tree having a plurality of mutually exclusive branches corresponding to the information represented by the data files a... | 09/09/1986 |