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| Number | Title | Issue Date |
| 4133329 | Electronic ignition device for internal combustion engines An electronic ignition device for an internal combustion engine comprises a capacitor supplied by a charging circuit, a thyristor controlling discharge of the capacitor into the primary of an ignition coil, and a control circuit including an oscillator su... | 01/09/1979 |
| 4131100 | Multiple spark discharge circuitry A multi-strike spark discharge system which is combined with an internal combustion engine to produce a plurality of high voltage discharges across the spark gap of the engine. A timing signal associated with the engine is treated and used to actuate a du... | 12/26/1978 |
| 4088927 | Interference-protected, switch-controlled square wave generation circuit To provide an undistorted square wave output signal under control of a switch subject to contact chatter so that the square wave will accurately reflect the operating instant of the switch, as commanded, regardless of contact chatter, a timing circuit is ... | 05/09/1978 |
| 3942896 | Measuring magnifier with special reticle A measuring device to determine whether the width of a printed bar falls within prescribed tolerances has a sleeve with a magnifying lens at one end and a reticle at the other end. The reticle is inscribed with indicia for providing an immediate visual in... | 03/09/1976 |
