Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5559696 | Mobile robot internal position error correction system An improved device and method for performing accurate mobile robot dead-reckoning by performing Internal Position Error Correction (IPEC) which corrects systematic as well as non-systematic dead-reckoning errors. A first variation utilizes a smart encoder... | 09/24/1996 |
| 5553812 | Inertial velocity command system A velocity command system is provided with a velocity stabilization mode wherein aircraft flight path referenced velocities are determined with respect to an inertial frame of reference, the flight path referenced velocities are held constant during pilot... | 09/10/1996 |
| 5539646 | Method and apparatus for an AGV inertial table having an angular rate sensor and a voltage controlled oscillator A low-cost solid state replacement circuit for an inertial platform with the resulting consequence of increased resolution, significantly reduced cost, and improved reliability and accuracy. The invention comprises no moving parts and permits the use of a... | 07/23/1996 |
| 5527003 | Method for in-field updating of the gyro thermal calibration of an intertial navigation system An in-field method for correcting the thermal bias error calibration of the gyros of a strapdown inertial navigation system. The method is begun after initial alignment while the aircraft remains parked with the inertial navigation system switched to navi... | 06/18/1996 |
| 5528502 | Satellite orbit maintenance system A technique for maintaining a satellite in an assigned orbit without control or intervention from the ground. Autonomously obtained navigational data provide a measurement of the actual orbit in which the satellite is traveling. So long as the measured or... | 06/18/1996 |
| 5512904 | Method and apparatus of establishing a vehicle azimuth The method and apparatus of establishing a vehicle azimuth provides for the automatic establishment of the vehicle azimuth for a vehicle positioning mechanism, and the continued improvement of accuracy, if desired. The method and apparatus accomplishes th... | 04/30/1996 |
| 5505410 | Instrument calibration method including compensation of centripetal acceleration effect A method and apparatus are provided for addressing the effect of centripetal acceleration upon estimates of cross-track velocity, for determination of east gyro bias error, generated with a taxiing aircraft. After initial estimates of crab angle, ratio of... | 04/09/1996 |
| 5485405 | Inertial rotation sensing apparatus and method An improved electro-mechanical inertial rotation sensor comprising a rotor which spins at substantially constant speed with respect to an inertial frame of reference. A pickoff generates a signal relating the rotational position of the rotor relative to t... | 01/16/1996 |
| 5479161 | Automatic calibration of redundant sensors A system for calibrating the sensors of a redundant sensor system by calculating a first set of error signals based on differences between a combination of the outputs and known values and calculating a second set of error signals based on differences bet... | 12/26/1995 |
| 5475600 | Mobile robot which utilizes inertial navigation to calculate shortest return distance A mobile robot with a navigation system using inertia includes a cylindrical reflecting plate disposed on the periphery of a compass for indicating a fixed direction regardless of the flow of the robot. A microcomputer determines the difference between th... | 12/12/1995 |
| 5457630 | System for onboard lift analysis and apparatus therefor A method and apparatus for measuring the lift generated by airfoils of an aircraft. This real-time analysis is accomplished by measuring a differential pressure between the upper and lower lift surfaces of the airfoils. The system comprises the steps of: ... | 10/10/1995 |
| 5450345 | Terrain referenced navigation-Schuler cycle error reduction method and apparatus A method for Schuler cycle error reduction is provided for use in a terrain referenced navigation system. Terrain Reference Navigation filter coefficients are analytically determined using a terrain reference navigation database and a hypothetical Schuler... | 09/12/1995 |
| 5442560 | Integrated guidance system and method for providing guidance to a projectile on a trajectory An inertial measurement unit is provided which includes a core inertial measurement unit having accelerometers and gyroscopes aligned along x, y and z axes to provide signals to an onboard computer to determine position of the vehicle upon which they are ... | 08/15/1995 |
| 5442558 | Method and system for determining vehicle position based on a projected position of a satellite The present invention includes a system for estimating the terrestrial position of a vehicle. The system receives electromagnetic signals from a plurality of sources and responsively producing respective ranges from each of said sources to said vehicle an... | 08/15/1995 |
| 5440326 | Gyroscopic pointer A vertical gyroscope is adapted for use as a pointing device for controlling the position of a cursor on the display of a computer. A motor at the core of the gyroscope is suspended by two pairs of orthogonal gimbals from a hand-held controller device and... | 08/08/1995 |
| 5424953 | Navigation apparatus A navigation apparatus performs operations for detecting and indicating at least the driving direction of a moving vehicle. The apparatus comprises an angular velocity sensor for detecting an angular velocity according to a change in driving direction of ... | 06/13/1995 |
| 5410487 | Dynamic error correcting apparatus for inertial navigation A counting section includes: a first gyro pulse counter which counts gyro pulses from each of X-, Y-, Z- and S-axis gyroscopes during each counting period after being reset immediately before the start of the counting period and outputs the count value as... | 04/25/1995 |
| 5394333 | Correcting GPS position in a hybrid naviation system A hybrid vehicle navigation system employs both GPS and dead reckoning sensors, working in parallel, to produce a sensed and a calculated position, respectively. The sensed and the calculated positions are compared to a road data base to determine separat... | 02/28/1995 |
| 5379223 | Inertial measurement and navigation system using digital signal processing techniques An inertial measurement and navigation system using a multisensor which provides analog acceleration and rate information to an analog to digital converter whose digital output is processed by a digital demodulator and fed to an AHRS systems processor who... | 01/03/1995 |
| 5357817 | Wide bandwidth stable member without angular accelerometers A three axis, single degree of freedom gyroscope based rate sensing platform has restraining torque developed for the platform from a feedback loop that includes electronics that decouples individual gyroscope outputs from the rate inputs that correspond ... | 10/25/1994 |
| 5355316 | Position aided evader maneuvering re-entry vehicle navigator A navigation system 12 for an evasive maneuvering reentry vehicle (EMRV) 10 includes a three-axes strapdown inertial navigator 14 which includes RLGs or other types of gyroscopes and also accelerometers. An altimeter, such as a radar altimeter 16, which i... | 10/11/1994 |
| 5339684 | Gravity aided inertial navigation system An autonomous covert Inertial Navigation System uniquely suited for underwater applications wherein Schuler and siderial errors are bounded without external navigation aids or active instrumentation of ground speed is achieved by integrating a conventiona... | 08/23/1994 |
| 5337245 | Location detecting apparatus with overspeed predicting means A location detecting apparatus comprising a road map memory having road map data stored therein, a heading sensor for sensing a heading of a vehicle, a velocity sensor for sensing a velocity of the vehicle to obtain distances traveled by the vehicle, a lo... | 08/09/1994 |
| 5335181 | Terrain referenced navigation--woods data base model A terrain referenced navigation system utilizing a woods database model including a method for increasing terrain referenced navigation accuracy by compensating for the existence of deciduous forests. Deciduous forests present increased terrain referenced... | 08/02/1994 |
| 5332180 | Traffic control system utilizing on-board vehicle information measurement apparatus A railway traffic control system in which accurate vehicle information is effectively available in real-time to facilitate control of traffic flow. Unlike prior art methods of precisely monitoring train location, the current invention is dependant only on... | 07/26/1994 |
| 5307206 | Image stabilization assembly for an optical system An arrangement for stabilizing the line of sight in an optical tracking system relative to inertial space over a specified range of frequencies utilizing a mirror/torquer/pickoff subassembly both as an inertial sensor and as a control effector.... | 04/26/1994 |
| 5301114 | Inertial navigation system including self-contained performance validating arrangement The accuracy of the performance of an inertial navigation system is validated by comparing data measured by a fourth gyro and accelerometer to an analytic equivalent constructed from measurements made by a primary gyro/accelerometer orthogonal triad.... | 04/05/1994 |
| 5297052 | Integrated fault-tolerant air data inertial reference system A fault-tolerant air data and inertial navigation reference system utilizes skewed axis inertial sensors and fault-tolerant redundant electronics to provide higher redundancy with fewer parts. Parallelly operating processor circuits each receive the indiv... | 03/22/1994 |
| 5270959 | Bias correction apparatus of gyro A bias correction apparatus comprising a gyro, bias calculation means for reading output data of the gyro every a certain fixed period after the apparatus is turned on and for calculating a bias value of the gyro on the basis of the read output data, stor... | 12/14/1993 |
| 5245537 | Golf distance tracking, club selection, and player performance statistics apparatus and method A golf distance tracking, club selection, and player performance statistics device having a portable movement measurer, a microprocessor connected to the movement measurer, a memory connected to the microprocessor, and an input keypad and a display output... | 09/14/1993 |
| 5235330 | Digital rebalance loop A digital rebalance system for an inertial reference sensor. The rebalance system associates the error signal output with a sample value of a stored error signal and generates a rebalancing torquing pattern waveform in response to the error signal. The sy... | 08/10/1993 |
| 5203220 | Optical tracking and stabilizing system with a gimbal mounted mirror for establishing a line of sight An optical tracking and stabilizing system which generates an error signal to control a gimbal set, which error signal has first and second components. The first error signal component is a low frequency domain position servo error signal and the second e... | 04/20/1993 |
| 5194872 | Inertial navigation system with automatic redundancy and dynamic compensation of gyroscope drift error An inertial navigation system with automatic redundancy and dynamically calculated gyroscopic drift compensation utilizes three, two-degree of freedom gyroscopes arranged whereby any two of the gyroscopes form an orthogonal triad of measurement sensitive ... | 03/16/1993 |
| 5184304 | Fault-tolerant inertial navigation system Disclosed herein is a Fault-Tolerant Inertial Navigation System comprising, in a preferred embodiment, a Redundant Set of at least two Inertial Navigation Systems, from which one may identify and isolate at least one instrument within an Inertial Navigati... | 02/02/1993 |
| 5177685 | Automobile navigation system using real time spoken driving instructions An automobile navigation system which provides spoken instructions to the driver of an automobile to guide the driver along a route is disclosed. The heart of the system is a computing apparatus comprising a map database, route finding algorithms, a vehic... | 01/05/1993 |
| 5172323 | Apparatus for determining the attitude of a vehicle A method of automatically determining attitude of a moving vehicle. Acceltion of the moving vehicle is measured with gyro stabilized accelerometers. The measurement is converted to a motion related vector in a first frame of reference. The coordinates ar... | 12/15/1992 |
| 5172322 | Vehicular traveling direction measuring system with automatic center coordinate position correction A system measures a traveling direction of a vehicle based on a direction toward a coordinate position defined by output data from a geomagnetic direction sensor from a first center coordinate position of a corresponding output circle. The system derives ... | 12/15/1992 |
| 5170354 | Vehicular traveling direction measuring system with automatic center coordinate position correction A ststem measures a traveling direction of a vehicle based on a direction toward a coordinate position defined by output data from a geomagnetic direction sensor from a first coordinate position of a center of a corresponding output circle. The system uti... | 12/08/1992 |
| 5166882 | System for calibrating a gyro navigator The present invention relates to a system for calibrating translation equons of a gyro navigator of a submarine. A value of velocity and a value of position of the submarine are produced by using values of acceleration sensed by accelerometers in the nav... | 11/24/1992 |
| 5128874 | Inertial navigation sensor integrated obstacle detection system A system that incorporates inertial sensor information into optical flow computations to detect obstacles and to provide alternative navigational paths free from obstacles. The system is a maximally passive obstacle detection system that makes selective u... | 07/07/1992 |
