Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7136672 | Mobile telephone with built-in camera and flash A mobile telephone quipped with a camera may employ, as a camera flash, one or more RGB tri-color LEDs arranged on a face of the mobile telephone which is aligned with the direction in which a photograph may be taken by the camera. The viewing angle of the RGB tri-c... | 11/14/2006 |
| 6993304 | Signal-input status display device for multi-band receiver An MCU 30 of a multi-band receiver detects signal input levels from level detection circuits 18 and 18′ of receiver circuits 4a and 4b, respectively, and thereby determines and identifies to which frequency band a s... | 01/31/2006 |
| 6859644 | Initialization of wireless-controlled lighting systems A method of initializing system components of a wireless-controlled lighting system. The system components include a remote control and a plurality of lighting units which communicate with a control master for the system via commonly-received radio communications. I... | 02/22/2005 |
| 6385466 | Portable terminal device A portable terminal device including display means 40 for indicating characters and figures, light-emitting means 31 and 32 for emitting exposing light to be used as backlight of the display means, drive means 21 and 22 for activating the light-emitting m... | 05/07/2002 |
| 6018648 | Process and device for displaying a transmitter name and a type of program transmitted in a digital data telegram on a radio receiver display A process and a device for displaying the transmitter name and type of program transmitted by a radio transmitter in a digital data telegram on the radio receiver display during a search run and where a timing element controls the display of information.... | 01/25/2000 |
| 5603104 | LCD system with integrated annunciator A display system (100) includes a liquid crystal display (140) which incorporates annunciator areas (142). Each annunciator area (142) has an aperture (146,147,148), independently controlled, to allow the passage of light through the annunciator area (142... | 02/11/1997 |
| 5210532 | Baby monitor receiver having indicator display and dual position clip A baby monitor receiver is provided for use in combination with a transmitter unit. The receiver includes a plurality of LED's positioned along the front upper edge of a housing for providing a visual indication of signals received by the receiver. The LE... | 05/11/1993 |
| 5126914 | Current inverter for an incandescent lamp in a car radio A lamp power control circuit for electric equipment which has a power supply, supplies power to incandescent lamps fitted to operating parts of electric equipment and is provided with a current-direction inverter unit. This current-direction inverter unit... | 06/30/1992 |
| 4876536 | Paging receiver with a light emitting element flashing circuit A paging receiver or a miniature receiver having a light emitting flashing circuit is provided in which a single boosting coil is shared by two light emitting elements and therefore the number of boosting coils required is one-half the number of light emi... | 10/24/1989 |
| 4637047 | Level indication apparatus for digitally encoded audio signal data An apparatus for indicating the level of digitally encoded audio data, in which a set of bits representing the audio signal amplitude are periodically latched in a latch circuit, with the resultant output bit signals from the latch circuit being displayed... | 01/13/1987 |
| 4495651 | Broadcast receiver comprising an entirely electronic control device A broadcast receiver is provided for mounting on board a motor vehicle, whose control circuit is entirely electronic. The receiver comprises a case whose front face, accessible to the user, is free from unevennesses or appreciable projections and which pr... | 01/22/1985 |
| 4491974 | Receiver having a light emitting display as frequency and tuning indicator A receiver having a light emitting display device indicating the frequency to which the receiver is tuned and the presence or absence of a received signal by the use of visually distinct display modes. In one embodiment, a first color indicates no receive... | 01/01/1985 |
| 4468814 | Radio channel visual identification system A visual identification system for a multi-channel radio having a channel selector switch is provided which produces a flashing light visible in all directions identifying the selected radio channel. The visual identification system comprises a plurality ... | 08/28/1984 |
| 4348666 | Signal level display apparatus A signal level display apparatus arranged so that an ac signal is superposed upon either an input signal or a reference voltage of a comparator to display the input signal with differences in degrees of brightness of illumination of light-emitting element... | 09/07/1982 |
| 4336534 | Control generator for use in broadcast receiver including improved signal level indicator A control signal generator for use with a broadcast receiver having a signal level indicator including a plurality of sequentially actuated luminous elements. The received signal strength is indicated by the number of luminous elements which are lit. The ... | 06/22/1982 |
| 4295136 | Indicating apparatus, particularly for vibration analyzing equipment Apparatus for visually indicating to an operator of a vernier, for example, that he is approaching a desired set point. The apparatus additionally indicates when the exact set point has been reached. This is accomplished with the use of a display, prefera... | 10/13/1981 |
| 4292467 | Control for audio receiver An audio receiver or other electronic device having a number of controllable functions is provided with control apparatus in which mechanical parts have been substantially eliminated. An electrically controllable device is provided to control each functio... | 09/29/1981 |
| 4285065 | Radio with audio graphic equalizer A pushbutton tunable radio having an integral audio graphic equalizer is disclosed. During a tuning mode of operation for the radio actuation of any of five presettable pushbuttons results in the selection of a predetermined radio channel frequency within... | 08/18/1981 |
| 4264979 | Display device for CB radio A display panel for a CB transceiver is disclosed which identifies to others the channel being used by the operator and other information such as the operator's code name or that the operator needs emergency assistance. The display panel is adapted to be ... | 04/28/1981 |
| 4229698 | Tuning indicator An indicator for displaying RTTY signals in a terminal unit. The terminal unit converts mark and space signals from a radio receiver at audio frequencies to digital pulses for a readout device. Proper tuning of the radio receiver is facilitated by viewing... | 10/21/1980 |
| 4227254 | Quasi-analog channel indicator for radio receivers A radio receiver receives a transmitted high-frequency signal which is mixed within the receiver with a local-oscillator-frequency signal to form an intermediate-frequency signal, which in turn is converted into an audio-frequency signal. A plurality of i... | 10/07/1980 |
| 4218773 | Superheterodyne receiver of scanning type with indicator means to display received frequency and frequency being stored in memory A superheterodyne receiver of a scanning type, comprising a high frequency amplifier, a mixer, a local oscillator, an interdmediate frequency amplifier, a detector, an audio frequency amplifier, a loud speaker, and an automatic scanning/manual scanning se... | 08/19/1980 |
| 4205270 | Station selection indicating device During preset station selection operation in a digital receiver the station selection switch most recently operated is indicated by a light so as to prevent erroneous operation at the same switch again.... | 05/27/1980 |
| 4122395 | Radio control circuit with microprocessor An FM tuner control circuit contains a digital frequency synthesizing control circuit, digital computer means including a microprocessor, a memory circuit, and a manual control circuit for digitally tuning the tuner to any desired FM station. The memory c... | 10/24/1978 |
| 4083012 | Automatic function setting and indication arrangement for a communications receiver A compact and efficient design of a function switching and indication arrangement for a TV receiver or other communications apparatus is described. The functional setting, illustratively indicative of a selected one of a plurality of TV channels, is chose... | 04/04/1978 |
| 4039956 | Electronic indicator An electronic frequency indicator for an AM/FM receiver utilizing a plurality of light-emitting diodes. The intensity of the diodes is varied to achieve greater resolution for the number of diodes in the indicator.... | 08/02/1977 |
| 3987401 | Indicating system using multicolor light emitting diodes An indicating system for a radio receiver is formed of an indicator and associated control circuitry. The indicator is comprised of two emitting diodes wired in parallel and in reverse polarity, and encapsulated in a translucent package. Each diode in an ... | 10/19/1976 |
