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 |
| 7265921 | Method to increase the amount of customer data on a hard disk drive Format efficiency of a hard disk of a hard disk drive having a rotary actuator and a read/write head having a read element that is offset from a write element is improved by writing a data track having a length that is based on an arc of the rotary actuator, the rad... | 09/04/2007 |