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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 |
| 6152375 | Remote control thermostat system for controlling electric devices A remote control thermostat system for controlling electric devices for remotely controlling electric heating and cooling devices for regulating temperatures inside a structure. The remote control thermostat system for controlling electric devices include... | 11/28/2000 |
| 6091218 | Energy conservation circuit and method for use with multi-phase motors used to power a variable load An energy conserving apparatus and method are disclosed. The apparatus is used for conserving power supplied to a multi-phase motor used to power a compressor having a high pressure output line. The motor has a plurality of voltage input lines for connect... | 07/18/2000 |
| 5220255 | Interface for interconnecting a thermostat and an electronically commutated motor An interface is disclosed for operatively interconnecting a conventional thermostat and an electronically commutated motor ("ECM"). The interface provides enable, heating and rate signals to the ECM in response to the conventional fan, heat, valve and air... | 06/15/1993 |
| 4443157 | Control circuit for a liquid fuel combustion apparatus A control circuit for a liquid fuel combustion apparatus which employs a differential amplifier and square-wave generator to maintain a strong constant combustion in the burner until the differential amplifier senses that room temperature has approached a... | 04/17/1984 |
