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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 6975624 | Network interworking device for LAN/internet A network interworking device used in a communication system which has a first communication network with an IP, a second communication network and a plurality of other network interworking devices connected to the first communication network, the network interworki... | 12/13/2005 |
| 6856650 | Method and apparatus for second or later generation coding of video signal At second or later generation coding of video signal in tandem video coding, at least one coding parameter of previous coding is estimated in accordance with picture properties of the input video signal, and the estimated coding parameter in the previous coding is u... | 02/15/2005 |
| 6456617 | Routing control communication system between circuit switched network and internet A routing control communication system includes a circuit switched network provided with a service control information database having a telephone numbers table, an interconnection network provided with a network communication protocol and an information ... | 09/24/2002 |
| 6445478 | Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator ... | 09/03/2002 |
| 6324166 | Call setup control apparatus in ATM switch A call setup control apparatus has a first calculation unit for calculating an objective value of cell loss ratio PB (u) of a buffer Bu in priority class u which is equal to or lower than a priority class k (u=k to K), based upon par... | 11/27/2001 |
| 6317534 | Optical wavelength routing device An optical wavelength routing device comprises an arrayed waveguide comprising a plurality of channel waveguides formed on a substrate, a plurality of input waveguides having 12 input ports located on an input side of the arrayed waveguide, a plurality of... | 11/13/2001 |
| 6292603 | Dispersion compensation device A dispersion compensation device comprises a chirped grating, and a first optical unit for guiding at least a lightwave signal with a wavelength of λi that needs a positive dispersion compensation and is applied thereto to one end portion of t... | 09/18/2001 |
| 6239834 | Apparatus for evaluating digital picture quality An apparatus for evaluating digital picture quality, includes a SNR calculation module for calculating a SNR based upon differences between data of video picture to be evaluated and data of original video picture, a module for calculating a power of AC co... | 05/29/2001 |
| 6178450 | Method and apparatus for monitoring a communication link based on TCP/IP protocol by emulating behavior of the TCP protocol A method and apparatus for monitoring a communication link based on TCP/IP protocol obtains a protocol data unit (PDU) between communication systems. A emulation log is produced by analyzing the PDU in a PDU analysis part. An event sequence log is produce... | 01/23/2001 |
| 6154506 | Timing recovery and tracking method and apparatus for data signals A timing recovery and tracking method and apparatus with respect to data signal in a digital communication system is provided. The method includes a step of setting a time window for making a decision based upon a predetermined threshold level, the time w... | 11/28/2000 |
| 6147974 | Apparatus for monitoring state of traffic in telecommunication network An apparatus for monitoring state of traffic in a telecommunication network by calculating ABR based upon BID and ANS per unit time in the network. This apparatus includes a model generation unit for receiving sampled data for generating models, the sampl... | 11/14/2000 |
| 6107961 | Map display system A map display system includes a plurality of geographic information servers, a geographic information search server and clients, connected to each other through network. The geographic information search server searches a plurality of geographic informati... | 08/22/2000 |
| 6108380 | Method and apparatus for deciding optimum orthogonal transform mode When a selective decision of the field mode/frame mode for orthogonal transform is made for each macroblock composed of a plurality of blocks in a motion picture coding system wherein coding of an interlaced TV signal proceeds in the frame structure and a... | 08/22/2000 |
| 6104746 | Spread spectrum communication system A combined channel or a composite channel is to be transformed into a plurality of element channels. The composite channel may be either shared by a plurality of communication stations on time division multiplex basis, or used by a single communication st... | 08/15/2000 |
| 6081838 | Method for access control on MIB in OSI management The managed object instance is used as access control unit, then access denial and permission are quickly decided. After a pre-process to the naming tree which is an object of access control, MOI included within every scope which can be designated by the ... | 06/27/2000 |
| 6078913 | Document retrieval apparatus A document retrieval apparatus is connected to a network, and includes a cluster database storing a cluster of node information elements linked for clustering the documents to a hierarchical tree structure based on degree of similarity in all of the docum... | 06/20/2000 |
| 6076164 | Authentication method and system using IC card A method and system for authenticating between a user or client and a network access entity such as a server or another client using an IC card. The method includes a step of executing an initial authentication using the IC card when the user first commun... | 06/13/2000 |
| 6061352 | ATM cell receiver system with source clock recovery A cell disassemble circuit in a cell receiver system detects the number of lost cells from information for detecting cell loss included in received cells, and separates a payload from a header in each of the received cells. The number of lost cells indica... | 05/09/2000 |
| 6023571 | System for filtering events occurred within a predetermined period of time A system for filtering events which have occurred within a predetermined period of time includes a first generation unit for generating association rules between the events (parameters) which simultaneously occur within the predetermined period of time, a... | 02/08/2000 |
| 6002931 | Interworking apparatus for roaming among different mobile networks An interworking apparatus for roaming among a plurality of mobile network having different inter-network signaling protocols is connected to the plurality of mobile networks and has a database record for holding network identity information for identifyin... | 12/14/1999 |
| 5978456 | Charging unit price determination/information apparatus and communication system having charging unit price information function A calling location and a receiving location are analyzed by called party number analysis means by processing a called party number for specifying a communication terminal at the receiving side transmitted by a communication terminal at the calling side is... | 11/02/1999 |
| 5978353 | Multiplex terminal station apparatus A service-system low-speed interface unit and a protection-system low-speed interface unit are each provided with an optical transmitting/receiving module adapted to communicate signals with a main terminal. The protection-system low-speed interface unit ... | 11/02/1999 |
| 5974082 | Spread spectrum communications system A spread spectrum communications system includes at least one communication station for transmitting a plurality of digital information data sequences via a plurality of communication channels by using the same PN code sequence. The communication station ... | 10/26/1999 |
| 5960176 | Apparatus for management of SNMP/OSI gateways The gateway apparatus for SNMP/OSI management enables that an SNMP manager manages an OSI management agent, by using a basic conversion of a management operation and a management information between SNMP and CMIP and by using a cache, a replica and a link... | 09/28/1999 |
| 5940131 | Method and apparatus for coding moving pictures A method for coding moving pictures using motion compensation for prediction has a step of producing motion vectors for a macroblock in a previous frame, the macroblock corresponding to a macroblock to be coded in a current frame, a step of motion-compens... | 08/17/1999 |
| 5907563 | Error control method and apparatus for wireless data communication An error control method for wireless data transmission over a digital mobile communication system includes a step of obtaining, during data communication, statistical information including transmission error information at a receiving side, a step of dete... | 05/25/1999 |
| 5883589 | Variable length code construction apparatus An apparatus for constructing a variable length code includes a unit for producing a unique word consisting of continuous N "0" bits, a prefix processing unit for producing a codeword including at least one "1" bit, the prefix of the codeword having conti... | 03/16/1999 |
| 5881154 | Data scramble transmission system A data scramble transmission system with a data transmission link coupled between sending and receiving ends is provided. The link adopts transmission frames each of which is constituted by data and control bits periodically added to the data. The system ... | 03/09/1999 |
| 5875425 | Speech recognition system for determining a recognition result at an intermediate state of processing A speech recognition system for recognizing a system user's speech can shorten a recognition period by reducing the amount of necessary calculations without deteriorating the accuracy rate of recognition. The speech recognition system successively calcula... | 02/23/1999 |
| 5854612 | Method and apparatus for controlling array antenna A method of controlling an array antenna having a plurality of antenna elements for providing antenna output signals by receiving TDMA burst signals. The method includes a step of estimating a DOA of incident signal based upon the antenna output signals, ... | 12/29/1998 |
| 5841476 | Coding apparatus for encoding motion picture A motion picture coding apparatus for searching a plurality of proposed coding modes and/or parameters, for selecting a suitable coding mode and/or a suitable parameter, and for encoding motion pictures using the selected coding mode and/or parameter. The... | 11/24/1998 |
| 5838689 | Cell Receiver A cell receiver includes, in addition to a cell decomposing unit, an interleaving memory, an error correcting unit, a FIFO memory, and a delay fluctuation absorption control unit, a delay fluctuation absorption buffer for absorbing delay fluctuation of a ... | 11/17/1998 |
| 5774462 | Unique word recognition system In a time division multiplex (TDM) signal in which a symbol is sent one by one periodically, a unique word in the TDM signal is recognized quickly in a receiving station. A receive station has essentially N number of correlators each having a specific uni... | 06/30/1998 |
| 5768476 | Parallel multi-value neural networks In a parallel multi-value neural network having a main neural network 16 and a sub neural network 18 coupled with the main neural network 16 in parallel for an input signal, the main neural network 16 is trained with a training input signal by using a mai... | 06/16/1998 |
| 5764860 | Learning method for multi-level neural network A learning method supervised by a binary teacher signal for a binary neural network comprises at least an error signal generator 10 for weighting factor updating, which generates an error signal for weighting factor updating having an opposite polarity to... | 06/09/1998 |
| 5761309 | Authentication system An authentication system whereby authentication load can be distributed in the network without sharing secret information of users is provided. The system has a single master authentication center arranged in the network, the master authentication center shari... | 06/02/1998 |
| 5751703 | Energy dispersal method for TDMA carrier In a radio communication system using time division multiple access system (TDMA) for access control method, modulation signal sent by a slave station is frequency-dispersed during a TDMA burst period by using a chirp signal which frequency changes contin... | 05/12/1998 |
| 5739943 | Polarization control unit Light beams emitted from an optical fiber are converted into parallel light beams by a lens, and then allowed to pass through a Faraday device, followed by being converged to an incident end of the optical fiber by a lens. The Faraday device is applied wi... | 04/14/1998 |
| 5740318 | Speech endpoint detection method and apparatus and continuous speech recognition method and apparatus A speech endpoint detection unit determines that a first condition is met when a matching score of a partial sentence accepted by a grammatical rule unit is the highest of all partial sentences, and that a second condition is met when a duration time of i... | 04/14/1998 |
| 5726767 | Automatic facsimile signal analyzing apparatus for a telephone exchange system An automatic facsimile signal analyzing system includes a switch unit, a service trunk, a signal identification trunk, a facsimile communication determination unit, and a control unit. The signal identification trunk restores a facsimile control signal fr... | 03/10/1998 |
