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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 7290709 | Information card system A data distribution system (10) including an information card (12) to work with a reader (14, 72). The information card (12) includes visible indicia (20) on its front, stripe zones (34) and a ring zone (36) nominally... | 11/06/2007 |
| 6294945 | System and method for compensating the dielectric absorption of a capacitor using the dielectric absorption of another capacitor A system and method, wherein the dielectric absorption of a capacitor is cancelled by a compensating circuit. One embodiment uses a compensation circuit comprising a compensating capacitor with substantially identical characteristics as the capacitor to b... | 09/25/2001 |
| 4622510 | Parametric electric machine A parametric electric machine consists of a series resonant circuit, which has a capacitance (C) which is adapted to be mechanically varied, an inductance (L) and a resistance (R). The no-load values of the capacitance (Co), inductance (Lo... | 11/11/1986 |
| 4560914 | High voltage amplifier for capacitive load A controlled supply device for a capacitive load with high voltage signals includes a circuit that produces an alternate low voltage control signal, an input capacitor which displays a capacitance which is much lower than that of the capacitive load, a no... | 12/24/1985 |
| 4138665 | Preamplifier for analog to digital converters A preamplifier using charge transfer techniques is formed on the same chip as a charge transfer analog to digital converter. The preamplifier then couples low level output sensors directly to the converter without need for a costly interfacing amplifier.... | 02/06/1979 |
| 3939468 | Differential charge amplifier for marine seismic applications A differential charge amplifier for use in towed marine seismic streamers and the like involving towed hydrophone arrays wherein the hydrophone outputs are conducted by long twisted pairs of leads to signal processing equipment, the differential charge am... | 02/17/1976 |
