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 |
| 7441193 | Adaptable and widely applicable control surface A control surface has one or more soft devices for which functionality may be assigned, a central processing unit (CPU), including operating code, for managing at least functionality of the soft devices on the control surface, and a network connection for connecting... | 10/21/2008 |
| 6839675 | Real-time monitoring system for codec-effect sampling during digital processing of a sound source A digital processing system for monitoring sound effects produced by codecs during a signal processing session is provided. The digital processing system comprises, a sound source for producing signals for processing, a sound monitor having at least two channels for... | 01/04/2005 |
| 6728382 | Functional panel for audio mixer A control device for an audio processor has a plurality of sets of function select controls and a function control section on its control device. Each set of the plurality of sets of function select controls is coupled with a corresponding channel in a plurality of ... | 04/27/2004 |