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| Number | Title | Issue Date |
| 5281956 | Heater diagnostics and electronic control for a clothes dryer A control for a clothes dryer with an induction drive motor and an electric resistance heater element. A single sense winding is threaded through sensors monitoring drive motor current and heater current, generating an output voltage each time the alterna... | 01/25/1994 |
| 4835516 | Arrangement for introducing audio-frequency signals into a power supply line An arrangement for introducing audio-frequency signals into a power supply line containing a compensating capacitor, through a junction converter having primary winding which is connected with an audio-frequency signal generator. The secondary winding of ... | 05/30/1989 |
| 4755792 | Security control system A security and control system for use in a home or building which utilizes a coded audio link between the entry detectors/transmitters and the relay modules, and a digital pulse coded power line communication ("PLC") link between the relay modules and the... | 07/05/1988 |
| 4658241 | Surveillance system including transmitter and receiver synchronized by power line zero crossings An article surveillance system includes a structure responsive to a first pulsed inductive magnetic field, periodically derived by a power line activated generator. The structure derives a second pulsed inductive magnetic field having a predetermined occu... | 04/14/1987 |
| 4528667 | System for the transmission of information messages A house system for the transmission of information messages which are encoded in the form of digital signals wherein a code is selected which facilitates the testing of each information bit, including a central station and a series of substations at which... | 07/09/1985 |
| 4218655 | Method and apparatus for transmitting intelligence over a carrier wave A method and apparatus for transmitting intelligence over a carrier wave are disclosed in which a signal waveform is added to a carrier wave to produce a composite wave having a recognizable pattern of variations in intervals that are defined by preselect... | 08/19/1980 |
| 4027286 | Multiplexed data monitoring system A multiplexed data monitoring system for use in monitoring the status of control valves or the like in subsea petroleum well control systems, utilizes an encoder circuit located externally of the control module and composed of passive electrical component... | 05/31/1977 |
