Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 6188561 | Circuit for driving the excitation coil of an electromagnetically driven reciprocating pump The invention pertains to a circuit for driving the excitation coil of an electromagnetically driven reciprocating pump used as an injection device, characterized by a circuit for driving the rotor excitation coil (600) which is connected to a power trans... | 02/13/2001 |
| 6161525 | Liquid gas engine A liquid gas engine includes at least one combustion chamber, in which a liquid gas/air mixture is introduced and ignited, the liquid gas engine having an injection device which injects liquid gas via an injection nozzle. The injection nozzle opens into t... | 12/19/2000 |
| 6138653 | Ignition system and principle of operation An electric ignition device for an internal combustion engine having a primary and a secondary circuit coupled together by a transformer. The secondary circuit includes a spark gap. The primary circuit includes a capacitor that can be discharged. The volt... | 10/31/2000 |
