Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7688195 | Bridge system for installing electronic appliance to light source socket and bridge method thereof A bridge system for installing electronic appliance to light source socket and a bridge method are disclosed. The system includes a light source plug, a power line communication module and a connection unit. The light source plug is electrically connected to the lig... | 03/30/2010 |
| 7420459 | Powerline networking device A powerline network device includes both power suppression and networking functions, and passes through power and data signals. The networking functions can include one or more of hub, router, and/or switch function, and therefore can form a subnet of devices plugge... | 09/02/2008 |
| 7378952 | Systems and devices for broadband communication with an alarm panel A communications system for an alarm panel including: an alarm panel adaptor in operable communication with the alarm panel generating analog alarm signals; a first powerline communications device in operable communication with a the alarm panel adaptor converting t... | 05/27/2008 |
| 7342507 | Revenue meter with power quality features Power quality detection, monitoring, reporting, recording and communication in a revenue accuracy electrical power meter is disclosed. Transient events are detected by monitoring the wave shape of the electrical power and comparing deviations to a known threshold. S... | 03/11/2008 |
| 7339458 | Power line communications interface and surge protector There is provided a system that includes an AC power input port for connection to an AC power line, an AC power output port for providing power from the AC power line, an AC power surge suppression circuit for limiting voltage at the AC power output port, a data por... | 03/04/2008 |
| 7321295 | Adapter for automobile use and in-vehicle system using this adapter A signal processing section 11 decodes an in-vehicle device signal S3 supplied to signal input terminals 141 to 14n and generates a decoded signal S2. An output terminal 13 is connected with a terminal device 30 | 01/22/2008 |
| 7319384 | Communication apparatus and communication method A communication apparatus includes a transmission signal generation section 1, a transmission signal control section 2, a transmission section 3, a leakage electric power detection section 4, and an electric power control judgment section... | 01/15/2008 |
| 7307511 | Power line communication system and method The last portion of the electrical distribution system is used to provide high-speed communications to residential homes. An aggregation point interfaces a medium voltage power line with a point-of-presence, and a power line bridge enables flow of communications sig... | 12/11/2007 |
| 7199706 | PLC intercom/monitor A digital intercom device consistent with certain embodiments uses power line communication (PLC). A power line interface connects to a power line serving as a communication medium. An audio codec is coupled to the power line interface for encoding and decoding digi... | 04/03/2007 |
| 7145440 | Broadband coupler technique for electrical connection to power lines Disclosed is a power line broadband communication system having broadband coupler devices capable of direct electrical connection to an energized power line. The coupler includes a conductive portion movable by an adjustable member from a non-conducting retracted po... | 12/05/2006 |
| 6992579 | Burglar alarm system having reduced wiring Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm controller and each remote input/output device (such as an entry keypad). The present alarm system has an alarm controller, a remote input/output device, a cable ex... | 01/31/2006 |
| 4812821 | Visual fire alert system A fire alert system providing a visual signal, such as a flashing light, in the event of actuation of one or more heat or smoke-sensing detectors. Each detector is wired to an alarm panel, as is a small signal transmitter having prongs for connection to a... | 03/14/1989 |
| 4782322 | Amplitude modulation of control signals over electrical power lines utilizing the response of tuning fork filters An electrical signalling apparatus including a transmitter and receiver connected to the same electrical power distribution network wherein a signal generated by the transmitter is used to control apparatus connected to the receiver. The system uses a pai... | 11/01/1988 |
| 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 |
| 4737769 | Fire detection alarm system An alarm system utilizing existing electrical wiring in conjunction with an alarm box. An alarm signal is manually or automatically generated and is converted to an RF signal which is conducted over the existing electrical wiring to an alarm box. The RF s... | 04/12/1988 |
| 4724381 | RF antenna for transmission line sensor A radiating antenna system for a self-contained sensor module mounted on a power transmission line. The module is capable of measuring various parameters such as line current, voltage, conductor temperature, and ambient temperature. The parameter values a... | 02/09/1988 |
| 4635040 | Fire detection alarm system A fire detecting system utilizing existing electrical wiring in conjunction with circuit protecting devices provided in a main panel box. Various sensors which sense the presence of a fire condition are directly affixed to plug receptacles or wall switche... | 01/06/1987 |
| 4622535 | Receiving circuit for a data transmission system A data transmission system for transmitting and receiving data over a transmission line includes a receiving station having a receiving circuit for simultaneously detecting current and voltage signals including the data in the transmission line and applyi... | 11/11/1986 |
| 4462113 | Cordless transmitting and receiving apparatus A cordless transmitting and receiving apparatus which is capable of providing transmitting and receiving between a key transmitting and receiving apparatus such as a telephone and a portable remote transmitting and receiving apparatus and in which a trans... | 07/24/1984 |
| 4365238 | Visual signalling apparatus An apparatus for visually signalling hearing impaired persons of the occurrence of an audible sound producing event. A plurality of sensing devices are individually located adjacent to a sound producing device, such as a telephone, doorbell, fire detector... | 12/21/1982 |
