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| Number | Title | Issue Date |
| 6527484 | Helical tooth broach A helical gear tooth broach having an elongate body having a series of axially aligned and spaced teeth disposed thereon. The direction of tooth spaces or traces of the teeth in a longitudinally extending helical alignment and the direction of the gullets... | 03/04/2003 |
| 6512759 | Transmitter and receiver An interleave frame is formed by combining slots corresponding to the same slot number in each frame when interleave process is performed in a super frame, and the data are read out along row or column direction (i.e. readout direction) and the data are w... | 01/28/2003 |
| 6504883 | Synchronous detector A synchronous detector used in a code division multiple access (CDMA) communication receiver comprises a correlator and a pre-synchronous decision circuit. The correlator calculates a plurality of correlation values between a received signal spread with a... | 01/07/2003 |
| 6493125 | Apparatus for stabilizing light source frequency The WDM light source comprises a light source which generates an optical signal for an optical channel. The optical signal is intensity modulated with modulating signals. The modulated optical signal is applied to a dispersion generating circuit, at which... | 12/10/2002 |
| 6489860 | Surface acoustic wave duplexer with first and second package ground patterns A surface acoustic wave duplexer of the present invention comprises a first surface acoustic wave filter having a first pass frequency band, a second surface acoustic wave filter having a second pass frequency band lower than the first pass frequency band... | 12/03/2002 |
| 6486912 | Image sensor with sampling control system An image sensor with sampling control system including a sensor unit 1 having a number of pixel circuits arranged in matrix, a memory unit 2 having a number of memory circuits 12 arranged in matrix, each memory circuits being corresponding to respective p... | 11/26/2002 |
| 6484184 | Database network system A database network system is capable of recognizing in a short time (within several minutes) the state of damage or the like of city lifelines (waterworks, electricity, and gas supplies) over a whole city. A database network system according to the presen... | 11/19/2002 |
| 6470316 | Speech synthesis apparatus having prosody generator with user-set speech-rate- or adjusted phoneme-duration-dependent selective vowel devoicing The speech synthesis apparatus according to the present invention includes a text analyzer operable to generate a phonetic and prosodic symbol string from text information of an input text; a word dictionary storing a reading and accent of a word; a voice... | 10/22/2002 |
| 6469683 | Liquid crystal optical device An optical device includes a transparent layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the tran... | 10/22/2002 |
| 6459327 | Feedback controlled substrate bias generator A feedback controlled substrate bias generator having a substrate bias level sensing circuit, a charge pump circuit and an improved oscillator is disclosed. The substrate bias level sensing circuit is coupled to a semiconductor substrate for sensing a bia... | 10/01/2002 |
| 6456613 | Direct communication method between slave units and PHS terminal for direct communication between PHS slave units A PHS terminal has a PHS slave unit and data processing equipment connected to the PHS slave unit for data communication. The PHS terminal includes a continuous slot forming circuit for continuously forming, at least at the time of direct communication be... | 09/24/2002 |
| 6455438 | Fabrication method for a semiconductor device According to the present invention, a semiconductor device is fabricated by the following processes. First, a film to be etched is formed on a semiconductor substrate. On the film to be etched is formed a resist film. Then, a first pattern group including... | 09/24/2002 |
| 6447834 | Feed additive for the livestock and the like A feed additive for livestock in which a first feed additive is prepared by mixing and pickling 50-80% by weight of urne (Japanese apricot) as a main ingredient, 1-3% by weight of shochu (Japanese distilled spirits) as a quiality-improving agent, 18-45% b... | 09/10/2002 |
| 6441394 | Intrinsic Josephson superconducting tunnel junction device Using an oxide superconductor that does not require cryogenic temperatures, a superconducting tunnel junction device is provided which can accurately control the magnitudes of critical current and step voltage necessary for electronics applications and wh... | 08/27/2002 |
| 6438626 | System implementing a state transition having an interface storing a new next state of a self block and exchanging the state information with other block Each block is multiplexed. Each block is provided with an interface portion (10). A section terminating portion (11) receives overhead information from an associated equipment, and an APS byte processing portion (12) converts APS bytes contained in overhe... | 08/20/2002 |
| 6434038 | Non-volatile memory using ferroelectric material and manufacturing method thereof A non-volatile memory including a storage device composed of a ferroelectric material having first and second remaining polarization characteristics offset from each other. Selection of a first or a second remaining polarization characteristic is determin... | 08/13/2002 |
| 6433377 | Chain RAM and method for fabricating the same A chain ferroelectric RAM includes a memory cell array having a plurality of memory cell, which connected in series between bit line and a plate line. Each memory cell includes a first ferroelectric capacitor having upper and lower electrodes between whic... | 08/13/2002 |
| 6417706 | Internal clock generator generating an internal clock signal having a phase difference with respect to an external clock signal An internal clock generation circuit according to the present invention comprises a phase comparator, a shift register, a filter, a monitor circuit, and a plurality of delay lines such as first and second delay lines. The first delay line has delay steps ... | 07/09/2002 |
| 6411540 | Ferroelectric random access memory and its operating method A ferroelectric memory device in which an imprint is prevented, and a method of operating the ferroelectric memory device to prevent its characteristics from deteriorating due to an imprint. The ferroelectric memory device includes a sense amplifier havin... | 06/25/2002 |
| 6411663 | Convolutional coder and viterbi decoder A convolutional coder performs rate 1/N and 1/M convolutional coding (M | 06/25/2002 |
| 6408039 | Radio communication apparatus employing a rake receiver A radio communication apparatus having a rake receiver for searching and combining reception paths. The apparatus includes at least one combination searcher/finger unit which performs a searcher operation for detecting signals on the reception paths and e... | 06/18/2002 |
| 6396974 | Optical switch An optical switch of the present invention has a plurality of elements arranged in each of a row and a column direction thereof, where the slits of each element are located at corresponding crossing point between an optical wave guide extending to a row d... | 05/28/2002 |
| 6391692 | Method of manufacturing an FET with a second insulation layer covering angular portions of the activation layer The present invention aims to provide a field effect transistor which inhibits an aggregation of silicon atoms attendant on heat treatment and has stable source/drain shapes. The field effect transistor according to the present invention is manufactured u... | 05/21/2002 |
| 6387844 | Titanium dioxide photocatalyst A titanium dioxide film having at least photocatalytic activity, whose light linear transmittance corresponding to light having a wavelength of 550 nm is not less than 50 % and whose thickness is 0.1 to 5 μm or so, is formed on a transparent substrate co... | 05/14/2002 |
| 6384620 | Signal deciding apparatus A signal deciding apparatus which can obtain a stable digital signal OUT irrespective of an amplitude and a duty ratio of an input signal IN is provided. The input signal IN is amplified by inverters (51 to 53 and 8) and outputted as... | 05/07/2002 |
| 6373243 | Magnetic media tester for testing a servo signal prerecorded in a magnetic media A device for positioning control of a magnetic head in consideration of eccentricity amount generated due to chucking under the same structure or condition as a hard disk drive of the actual machine is provided. The device includes a thin suspension for s... | 04/16/2002 |
| 6374029 | Optical device An optical device having a large extinction ratio and being suitable for the digital operation including first and second electrodes (7, 8) formed on both sides of a waveguide structure, respectively such that a carrier-injection region (3a) and a non-car... | 04/16/2002 |
| 6373893 | Motion vector detection device The invention intends to provide a motion vector detecting device capable of increasing the processing speed and simplifying the construction of the device. The motion vector detecting device relating to the invention searches a block most similar to a re... | 04/16/2002 |
| 6373421 | Voice recording/reproducing device by using adaptive differential pulse code modulation method A voice recording/reproducing device implemented by using an ADPCM (Adaptive Differential Pulse Code Modulation) method is provided which is capable of reproducing faithfully an original voice even -at a time of performing a fast-forward reproduction by r... | 04/16/2002 |
| 6356382 | Optical wavelength converter with active waveguide An optical wavelength converter, including first and second semiconductor optical amplifiers, in which an input optical pulse signal having a first wavelength λ1 and a non-modulated optical signal having a second wavelength λ2 are ... | 03/12/2002 |
| 6347542 | Method and arrangement for non-destructive determination of the properties of an object A method and arrangement for the nondestructive determination of a property of an object including a conveyer for movably supporting the object. A testing unit, including a movable member and a stroking body, is mounted adjacent the conveyer. The conveyer... | 02/19/2002 |
| 6341086 | Semiconductor memory circuit including a data output circuit A semiconductor memory circuit comprises a sense amplifier, a first data storing circuit for temporally storing and outputting the data from the sense amplifier in response to a latch signal and erasing the stored data in response to a first clear signal,... | 01/22/2002 |
| 6326773 | Power conversion apparatus A voltage amplitude adjuster including semiconductor switches for power conversion, an AC chopper for converting an input AC voltage to an AC voltage of the same phase and different amplitude relative to the input AC voltage, and a smoothing AC filter for... | 12/04/2001 |
| 6320888 | Frequency stabilized laser and method for preparing thereof A frequency stabilized laser using an integrated external cavity, comprising a semiconductor laser diode and an optical waveguide installed on the same substrate, and having an optically induced grating formed in the optical waveguide suppresses mode hopp... | 11/20/2001 |
| 6315646 | Processing system for increasing the quality of a gear and a barreling apparatus usable in the same A processing system for increasing the quality of a gear having a shot peening apparatus for subjecting, to shot peening, a gear after tooth-forming and surface hardening; a barreling apparatus positioned adjacently to the shot peening apparatus, for subj... | 11/13/2001 |
| 6317529 | Optical cross-connect apparatus An optical cross-connect apparatus accepts a wavelength-division M-multiplexed optical signal (M is an integer). The apparatus has N input ports and N (N is an integer) output ports. To each input port, a wavelength-division multiplexed optical signal is ... | 11/13/2001 |
| 6288391 | Method for locking probe of scanning probe microscope In a method for locking a probe of a scanning probe microscope at any desired position on a specimen surface plane for any desired time period, after taking a first microscopic image of a specimen surface area including the desired position, the probe is ... | 09/11/2001 |
| 6277248 | Ozone production facilities and method of their operation A method of operating ozone production facilities comprises supplying a starting gas from oxygen production facilities alone to an ozonizer when the consumption of oxygen is within the production capacity of the oxygen production facilities; or mixing pur... | 08/21/2001 |
| 6266461 | Optical fiber switch circuit An optical fiber switch circuit combines optical fiber switches that are capable of switching the connection of many circuits at the same time by using fewer actuators. The optical fiber switch circuit combines at least one N x 2N, N being equal or greate... | 07/24/2001 |
| 6263139 | Optical transmission system with group velocity dispersion compensation To suppress S/N degradation due to optical amplification and generation of a nonlinear optical effect in a dispersion compensating fiber, and compensate for a loss due to the dispersion compensating fiber without incorporating a long fiber inside a receiv... | 07/17/2001 |
