Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 5050210 | Metallic current limiter A circuit for the non-linear limiting of the metallic current flowing in telephone line conductors. The circuit senses the metallic current flowing in the conductors. If that current exceeds a predetermined limit, the circuit provides from a controlled an... | 09/17/1991 |
| 5050211 | Safety interlock The safety interlock for a cover of a housing in a telephone apparatus provides electrical safety for the user by requiring the apparatus to be disconnected from a telephone line before the cover of the housing can be opened. The apparatus is connected to... | 09/17/1991 |
| 5050212 | Method and apparatus for verifying the integrity of a file stored separately from a computer A method and apparatus for verifying a file stored separately from a computer to be identical with a previous version of the file, before using the file. This verification is done by following a defined procedure to generate a first identifier based on th... | 09/17/1991 |
| 5050213 | Database usage metering and protection system and method A "return on investment" digital database usage metering, billing, and security system includes a hardware device which is plugged into a computer system bus (or into a serial or other functionally adequate connector) and a software program system residen... | 09/17/1991 |
| 5050214 | Remote control circuit A remote control circuit for remotely controlling a power source and a volume of a main set from a stereo-headphone composed of a remote control transmitting circuit arranged in a headphone, and a remote control receiving circuit arranged in a mainset.... | 09/17/1991 |
| 5050215 | Speech recognition method For circumstance adaption, for example, speaker adaption, confusion coefficients between the labels of the label alphabet for initial training and those for adaption are determined by alignment of adaption speech with the corresponding initially trained M... | 09/17/1991 |
| 5050216 | Effector for electronic musical instrument An input waveform signal is converted in an A/D converter into a digital signal to be written in a waveform memory under control of a tone generation control unit. The written digital signal is read out from the waveform memory with a designated delay tim... | 09/17/1991 |
| 5050217 | Dynamic noise reduction and spectral restoration system An audio processor consisting of a "single-ended" dynamic noise reduction system cascaded and cross-coupled with a program-adaptive dynamic equalizer. The audio at the output has a consistent subjective spectral texture even if the spectral texture of the... | 09/17/1991 |
| 5050218 | Apparatus for recognizing address appearing on mail article An address recognition apparatus and method is disclosed in which keyword and/or postal code detection is initially performed in order to limit the number of address dictionaries needed for final address detection. According to one embodiment, detected ke... | 09/17/1991 |
| 5050219 | Method of handwriting recognition A method of recognition of handwriting consisting in applying predetermined criterions to a tracing of handwriting or to elements of this tracing so that several characterizing features of this tracing or of these elements be determined, comparing charact... | 09/17/1991 |
| 5050220 | Optical fingerprint correlator A high-speed optical fingerprint correlator. The invention uses the unknown ingerprint to produce a matched filter for autocorrelation and detecting and displaying the resultant indicia of correlation, the correlation peaks produced. The matched filter is ... | 09/17/1991 |
| 5050221 | Image generating apparatus An image generating apparatus having a character recognizing function and a graphic function. Recognizing means recognizes contents of a document, while arithmetic operating means performs arithmetic operations with the recognized information. Graph forma... | 09/17/1991 |
| 5050222 | Polygon-based technique for the automatic classification of text and graphics components from digitized paper-based forms A polygon-based graphics/text separation method is comprised of two sequential processes. First a raster to contour vector conversion step is used to convert a digitized bitmap into a collection of simple polygons. Next a component classification process ... | 09/17/1991 |
| 5050223 | Method of and apparatus for processing image signal A new image (S'ij) is generated from an image signal (Sij) by determining whether the configuration of the distribution of the image signal (Sij) at a point of interest (i, j) is upwardly convex, or a downwardly convex, or otherwise, employing, as the new... | 09/17/1991 |
| 5050224 | Character recognition apparatus An input character image signal is converted into binary image data and then stored in an image memory. The binary image data stored in the image memory are profiled in the directions of X and Y axes to set a rectangular region circumscribing a desired ch... | 09/17/1991 |
| 5050225 | Image processing apparatus and method An image processing apparatus and method is disclosed for rapidly rotating images through selected angles by first generating each pel row of a scaled version of an original image in response to scaling values determined by the rotation angle selected; th... | 09/17/1991 |
| 5050226 | Ultrasonic echographic imaging device utilizing an improved adaptive filter An ultrasonic echographic imaging device for two dimensions (x, y), includes an adaptive filter for reducing the interference noise in the images obtained. A first circuit differentiates the signal (E(x, y)) applied to the adaptive filter and a second cir... | 09/17/1991 |
| 5050227 | Method of and apparatus for image smoothing along a tangential direction of a contour Smoothing in a tangential direction of a contour and detail enhancement in its perpendicular direction are simultaneously achieved with spatial filters having prescribed weighing factor distribution. An area including a contour is first designated, and a ... | 09/17/1991 |
| 5050228 | Apparatus for converting image outline data into dot data representative of image dots A data converting apparatus for converting outline data representative of an outline of a character, into dot data including dot-forming bits each indicative of the presence of an image dot to be formed at a position of a corresponding dot-forming picture... | 09/17/1991 |
| 5050229 | Method and apparatus for thinning alphanumeric characters for optical character recognition The width of each stroke in a character image is reduced one pixel at a time over a series of repetitive cycles until the number of cycles exceeds a predetermined number proportional to the thinnest character stroke observed in the character image. The pr... | 09/17/1991 |
| 5050230 | Hybrid residual-based hierarchical storage and display method for high resolution digital images in a multiuse environment An image processing method is described for the hierarchical storage and display of high resolution digital images in a multiuse environment. The method makes reduced resolution versions of the original image available for quick display on video monitors ... | 09/17/1991 |
| 5050231 | Relief image scanner A relief image scanner scans successive linear areas on an information-carrying medium such as a plastic card, illuminating each area from two different directions. The reflected light is converted to first gray-level data when the illumination is from on... | 09/17/1991 |
| 5050232 | Movable heat treating apparatus utilizing proportionally controlled infrared lamps An apparatus for heat treating the surface of a body includes at least one infrared lamp carried on a stand. A circuit is provided for controlling the energization of the lamp. The circuit includes a parameter input mechanism for permitting an operator to... | 09/17/1991 |
| 5050233 | Rotary compressor A rotary compressor includes first and second compressor sections, and a motor for driving the compressor sections. The first and second compressor sections have first and second cylinders, respectively, and each cylinders has a suction port. First and se... | 09/17/1991 |
| 5050234 | Method for connecting a channel between a base station and a mobile station A radio communication system comprises a plurality of subsystems each including a base station and a mobile station. A connection is to be allowed between the base and mobile stations in a subsystem by a first decision, when they have a first distance sho... | 09/17/1991 |
| 5050235 | Transmitter using gallium arsenide FET with means for controlling gate bias voltage of the FET for suppressing undesired signal at a start condition of the transmitter A transmitter using a gallium arsenide FET in a power amplifier and having a biassing circuit for generating a gate biassing voltage for the FET, a first power supply for supplying a first power to the biassing circuit and a second power supply for supply... | 09/17/1991 |
| 5050236 | Radio frequency field strength enhancer A radio frequency field strength enhancement system (402) having a member (404) with at least one tuning impedance (405) for adjusting a desired frequency response associated with the member (404) and means for retaining (408) the member (404) in close pr... | 09/17/1991 |
| 5050237 | Radio receiver having automatic bandwidth control during tuning In this radio receiver, the charge on a capacitor (14) controls the bandwidth of filters in the receiver's audio circuits. When tuning the radio, a bandwidth control circuit (13) forces this capacitor (14) to discharge, thereby forcing the audio path to b... | 09/17/1991 |
| 5050238 | Shielded front end receiver circuit with IF amplifier on an IC A semiconductor integrated circuit for a radio comprises: a front end circuit block (1) including at least an oscillation circuit (1b) and a mixing circuit (1c), for converting an RF signal to an IF signal; and an IF amplifying circuit block (2) for ampli... | 09/17/1991 |
| 5050239 | Laser power supply and control device for a fiber optic link between a subscriber and a telecommunications central office A laser power supply and control device for a fiber optic link between a subscriber and a telecommunications central office provides selection of one of two data sources and varies the laser current. The device includes a current generator controlled by a... | 09/17/1991 |
