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 |
| 7616004 | Backplane tester and method of use The present invention can be generally described as a backplane test device that provides the possible flexibility of being operationally resident on a standard card form factor, and thereby, potentially able to provide a testing capability that does not require the... | 11/10/2009 |
| 7573572 | Drift tube amplifier and method to amplify current A drift tube amplifier having an input and an output. The drift tube amplifier including a current-to-voltage converter for converting input current to a voltage, a band pass filter assembly for reducing unwanted noise within the voltage, a voltage controlled amplif... | 08/11/2009 |
| 7573235 | Battery charger and power reduction system and method The present invention is a shunt-type, battery-charging device that (through the use of a power dissipation and/or power reduction system and/or method) is designed to reduce the likelihood of overcharging and the possible deleterious effects (and cooling requiremen... | 08/11/2009 |