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 |
| 8057237 | System for evaluating skills of to-be-examined person According to a question displayed on a computer screen, a to-be-examined person selects, out of constituent elements (components) displayed on the screen, constituent elements that he considers optimum for the question and then makes a design by constructing them on... | 11/15/2011 |
| 7134877 | Demonstration system of electronic equipment and demonstration method for electronic equipment A demonstration system of an electronic equipment. The electronic equipment includes first and second operation units which are arranged on a front panel of the electronic equipment. In the first operation unit, there are provided display device, various operation k... | 11/14/2006 |
| 7126490 | Point of sale display for doorbell A doorbell having interchangeable chimes and interchangeable decorative covers is displayed for sale to the retail public such that a customer may easily choose a specific chime sound and combine it with a specific decorative cover enabling the customer to buy a doo... | 10/24/2006 |
| 7024154 | Training tracking system and method of use A method of processing training data is provided. The method includes accessing training data stored in at least one of a plurality of training databases, the training data being related to at least one of a plurality of employees. The method also includes providing... | 04/04/2006 |
| 6919728 | Calibration cache and database A method and apparatus for calibrating an oscilloscope and storing the calibration results for further use. Accordingly, an oscilloscope is provided with a calibration cache database for storing various calibration curves and their associated states. Each time the o... | 07/19/2005 |
| 6834207 | Operating guidance system for medical equipment A remote maintenance and operating guidance system in which data relating to the operation of a medical system in a hospital is transmitted to an operator who operates an operating device of the medical system from a service center by way of a communication device s... | 12/21/2004 |
| 6764311 | System and method for training/managing basic ability A training/managing system and method of basic ability which enables objective and efficient management for improving the basic ability of persons by training toward some kind of target. The training/managing system of basic ability 1 is provided with trainin... | 07/20/2004 |
| 6758679 | Installation instruction conveying device (electronic components) mechanical An installation instruction conveying device. In one embodiment, the installation instruction conveying device is comprised of a first surface having instructions visibly disposed thereon for installing a component. The installation instruction conveying device is f... | 07/06/2004 |
| 6650545 | Cabinet of electronic device for housing electronic components and electronic device having the cabinet It is an object of the preset invention to provide a cabinet for the electronic device which ensures sufficient rigidity of the device even if made thin. The cabinet (3) according to the present invention has central chassis (4) in which a device main bod... | 11/18/2003 |
| 6589683 | Regenerative fuel cell learning kit Educational kit which combines a unitized regenerative fuel cell with a demonstration platform to illustrate the principals of fuel cell use and application. A fuel cell education kit provides valuable exposure to the principals of fuel cell generated ele... | 07/08/2003 |
| 6224382 | Method and apparatus for developing computer screen layout A method and apparatus for developing a computer screen layout provides a plurality of physically manipulable pieces each representing one of a plurality of computer screen objects. The pieces are removably secured to a surface representing a computer scr... | 05/01/2001 |
| 6086377 | System and method for product and service configuration A method and system for demonstrating the context of features of a product or service, receiving selections of those features from a user, and modifying the demonstration to show the consequences of the received selections.... | 07/11/2000 |
| 6067084 | Configuring microphones in an audio interface A method for configuring an audio interface for a speech recognition application in a computer system comprises the steps of: (a) displaying a first graphical user interface (GUI) prompting a user selection of an audio input device between: a headset havi... | 05/23/2000 |
| 5933329 | Board for mounting display element A board usually resembling a PCB or a PWB mounts a display element, whose appearance in a viewing direction is controlled by the sense of magnetization of a core which extends through a bore in the board. A conducting coil formed on the surface of said bo... | 08/03/1999 |
| 5809675 | Board for mounting display element A board usually resembling a PCB or a PWB mounts a display element, whose appearance in a viewing direction is controlled by the sense of magnetization of a core which extends through a bore in the board. A conducting coil formed on the surface of said bo... | 09/22/1998 |
| 5738525 | Cable attenuation simulator for training CATV technicians A simulator for simulating the attenuation characteristics of a length of coaxial cable in a cable television (CATV) network employs a diplex filter to separate the CATV signal and AC power into at least two separate signal paths. The AC power path has a ... | 04/14/1998 |
| 5611691 | Modular construction kit using electronic control modules The present invention provides a modular electronic construction kit having modular control circuit boards or modules capable of achieving various types of electrical control for controlling movement of mechanical elements and the like. Each module includ... | 03/18/1997 |
| 5499019 | Method and apparatus for providing a demonstration mode in a data communication receiver A data communication receiver (100) for operating in a demonstration mode comprises a receiving circuit (110) for receiving and decoding radio frequency signals, a battery (140) for powering the receiving circuit (110), and a display (150) for displaying ... | 03/12/1996 |
| 5478241 | Method and system for automatically demonstrating the effectiveness of an eye protection screen An automatic demonstration system for showing the effectiveness and advantage of a particular eye protection screen to be promoted includes an actuation device for moving the eye protection screen between a position for shielding a cathode ray tube (CRT) ... | 12/26/1995 |
| 5378157 | Device for simulating electrical characteristics of components A device for simulating electrical characteristics of an electrical, electronic or electromechanical component comprising circuitry (21) adapted to reproduce electrical characteristics which are produced by, or may be sensed in, the component, the device ... | 01/03/1995 |
| 5261824 | Sales promotion vehicle for demonstrating mobile electronic accessories A portable sales promotion apparatus for electronic systems comprises electronic control modules and electronic output devices that are transported from the retailer's supply storeroom to the outside site of the customer's parked mobile vehicle where they... | 11/16/1993 |
| 5154615 | Educational toy An educational toy for use with children in an age range of about 4 to 12 as a mounting base with an upper surface on which various action modules are mounted. The action modules include a DC power source, and a switch. The action modules can include a nu... | 10/13/1992 |
| 5029116 | Oscilloscope operation supporting device An oscillosope operation supporting device which assures easy and correct use of an oscilloscope by an operator unfamilar with such an instrument. The device is used in combination with an oscilloscope and comprises a controlling means, an operator guide ... | 07/02/1991 |
| 5004424 | Apparatus for demonstrating and studying the operation of a fuel cell The apparatus comprises five main components: two catalysed electrodes (1 and 2), and three plastics parts, a top tube (3), a spacer (4) and a bottom tube (5). The apparatus may be partially immersed in a liquid mixture (11) of fuel and electrolyte, e.g. ... | 04/02/1991 |
| 4854039 | Prototype circuit board and method of testing A light table work station is provided for use in combination with a transparent prototype circuit board. At least a portion of each circuit trace on a circuit board is viewable when the board is populated with components, and back lit when the board is p... | 08/08/1989 |
| 4842520 | Analogue simulator for control circuits, actuated from operating station or cockpit The simulator is used for the training of personnel. In the case of the controls of an aircraft, the simulator contains an exact reproduction of the command cockpit (1) with all its controls (2), and capable of ensuring the actuation of circuit simulation... | 06/27/1989 |
| 4776798 | Energy managment microprocessing training system providing instruction for the programming and computerization of mechanical and electrical control systems, adapted to be a component with and an improvement for existing changeable modular training systems The changeable modular training system disclosed in U.S. Pat. No. 4,623,312 is extended to include an energy management microprocessing unit, i.e. CPU, a keyboard, a video screen, a remote sensor, and a microprocessing interface unit, to create an energy ... | 10/11/1988 |
| 4685122 | Interface circuit for remote control of a PABX An interactive audio/visual demonstration system for connection to a telephone system, comprising an audio/visual unit connected to an interface circuit. The interface circuit decodes DTMF tones received from the audio/visual unit and in response causes i... | 08/04/1987 |
| 4650425 | Technology teaching apparatus A system of technology teaching equipment including a support structure providing both horizontally and vertically disposed support areas with means for the removable attachment of components, the support areas including T-slots for the engagement of comp... | 03/17/1987 |
| 4623312 | Changeable modular training system to provide instruction for installing, servicing, troubleshooting and operating electromechanical control systems A module for use in a training system assembly which includes a power base is multi-sided and includes mechanical-electrical feet on one side for jacking the module into the power base or into a second module. Detent spring latches are disposed on another... | 11/18/1986 |
| 4604064 | Portable demonstrator for electronic equipment A portable audio-visual demonstration apparatus which provides operational instruction and functional simulation or particularized electronic equipment for training and exhibition purposes is disclosed. The preferred embodiment of the invention is the app... | 08/05/1986 |
| 4331944 | Switched-capacitor resistor simulation circuits An integratable switched capacitor simulation circuit comprising an integrated capacitor C3 having bottom and top plates thereof electrically connected to first and second nodes, and a pair of integrated capacitors C1 and C2 having their top plates electr... | 05/25/1982 |
| 4315320 | Educational analog computer laboratory This invention relates to a book-sized, self-contained analog computer, organized to enable an inexperienced person to program readily a differential equation. In this computer permanent circuits are either exposed or indicated as solid lines. Connections... | 02/09/1982 |
| 4267646 | Telephone question and answer training device A device for training individuals, particularly children and the handicapped, in the use of a telephone. The training device may be employed in either a single telephone mode or a dual telephone mode. In the single telephone mode a primary telephone is in... | 05/19/1981 |
| 4137650 | Teaching aid A teaching aid providing text for a spoken commentary by a teacher and transparencies for simultaneous illustrative visual display, said aid comprising a loose-leaf binder of folded sheet material to form an enclosing case, means on adjacent folded flaps ... | 02/06/1979 |
| 4132312 | Packaging unit for use in the marketing of alarm systems A packaging unit for use in the marketing of compact alarm systems including a flat supporting sheet, a flat panel smaller than the supporting sheet and pivotally coupled to the supporting sheet along one edge, at least one alarm actuating device provided... | 01/02/1979 |
| 4091550 | Automated instructional apparatus and method The disclosure describes a computer-aided instructional system for teaching a student to trouble-shoot a piece of equipment, such as a radio receiver, with a tester, such as a volt-ohm meter (VOM). In order to achieve this result, the receiver and VOM are... | 05/30/1978 |
| 4041616 | Circuit design apparatus Apparatus for representing the connections between a plurality of circuit components to be connected in a circuit and a multiplicity of flow lines in the circuit comprises a first member having a multiplicity of equally spaced lines thereon to represent t... | 08/16/1977 |
| 4026039 | Educational device for learning basic measurements An educational kit for teaching a student about basic electrical measuring devices is disclosed. The kit includes an instructional means, and a simulator board which permits the student to learn how to use electrical meters by taking measurements of vario... | 05/31/1977 |
| 4026040 | Educational device for learning about inductors An educational kit for aiding a student in the understanding of the induction of electrical current and the basic functions of inductors in electrical circuits is disclosed. The educational kit includes an instructional device, preferably in the form of a... | 05/31/1977 |
