Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7319413 | Method and system to calculate an approximate location of a mobile station in a recurrent route A method and system for calculating the approximate location of a mobile station along a recurrent route is disclosed. In an embodiment for the method in accordance with the principles of the present invention, the method for storing reference data includes decoding... | 01/15/2008 |
| 7096120 | Method and arrangement for guiding a user along a target path An audio-based guide arrangement is provided for guiding a user along a target path by the use of virtual audio beacons. The user's current location is sensed and compared to the target path. Sounds are fed to the user, for example through stereo headphones, to simu... | 08/22/2006 |
| 7002489 | Method and system to calculate an approximate location of a mobile station in a recurrent route A method and system for calculating the approximate location of a mobile station along a recurrent route is disclosed. In an embodiment for the method in accordance with the principles of the present invention, the method for storing reference data includes decoding... | 02/21/2006 |
| 6915208 | Information transfer in a multi-mode global positioning system used with wireless network The present invention discloses a GPS system that can operate in different modes depending on the network facilities and bandwidth available, the GPS information that can be acquired, or user or system requirements. The modes comprise standalone mode, where a mobile... | 07/05/2005 |
| 6889002 | Recording medium on which navigation information is recorded and information reproducing apparatus therefor A recording medium and an information reproducing apparatus capable of quickly reading navigation information are offered. The recording medium has a plurality of recording layers, on each of which navigation information is recorded. Navigation information having a ... | 05/03/2005 |
| 6151549 | System for controlling engine fueling according to vehicle location A system for controlling fueling of an internal combustion engine based upon vehicle position includes a receiver associated with the vehicle that is capable of receiving position and altitude information. The vehicle includes a control computer that deli... | 11/21/2000 |
| 5983156 | System for controlling engine fueling according to vehicle location A system for controlling fueling of an internal combustion engine includes a receiver associated with the vehicle, such as a GPS, GLONASS or LORAN-C receiver, operable to receive radio signals relating to vehicle location, a fueling system responsive to f... | 11/09/1999 |
| 5627546 | Combined ground and satellite system for global aircraft surveillance guidance and navigation The present invention provides a combined ground and satellite system for global aircraft surveillance, navigation, landing guidance and collision avoidance which comprises a satellite subsystem consisting of both a satellite constellation and associated ... | 05/06/1997 |
| 5572427 | Doppler position bearing angle locator A Doppler position locator for determining the bearing of a signal source from a moving receiver. The signal source encodes a digital signal indicating its actual transmitting frequency on a transmitted carrier. The moving receiver such as an airplane rec... | 11/05/1996 |
| 5532701 | Arrangement for comparing two temporally separated bursts of signal at two different frequencies A comparator circuit compares two temporally separated input bursts of signals which occur at two different frequencies. The first burst is an interrogation pulse and the second burst is a reply pulse in a DME system. The comparator circuit includes a fir... | 07/02/1996 |
| 5450329 | Vehicle location method and system A vehicle location system and method whereby the position coordinates of a vehicle are made available to other vehicles or to fixed locations by transmission of a data message containing position coordinates of the vehicle. The time slot in which the data... | 09/12/1995 |
| 5369589 | Plural information display for navigation Apparatus for visually displaying simultaneously on one screen two variables that characterize the path followed by a land, marine or airborne vessel with reference to a preselected or ideal path that extends from a beginning point to an ending point. Usi... | 11/29/1994 |
| 5128873 | Aircraft rendezvous using low data rate two-way TACAN bearing information Aircraft rendezvous is facilitated by operating airborne remote aircraft TACAN stations in the inverse bearing mode and using low data rate range interrogation and range reply signals for determining bearing. An aircraft determines its bearing to another ... | 07/07/1992 |
| 4918610 | Navigation, communication, and surveillance system based on DME The distance measuring Equipment (DME) is a well-approved means for short nge navigation in international civil aviation. It utilizes the inherent capacity of the system in most applications to a relatively small degree. Therefore, additional functions ca... | 04/17/1990 |
| 4843399 | Portable navigational communications transceiver A hand held navigational-communications transceiver is compressed into a case having a volume of about 37 cubic inches by defining functional implementation for VOR (VHF omni-directional range) navigation. The transceiver can be selectively switched to pr... | 06/27/1989 |
| 4788645 | Method and apparatus for measuring relative heading changes in a vehicular onboard navigation system A method and apparatus for measuring relative heading changes in a vehicular onboard navigation system is provided comprising apparatus for providing signals corresponding to differential wheel distance measurements, the velocity and wheel tracking distan... | 11/29/1988 |
| 4692869 | Aircraft navigational systems and methods for creating navigational guidepoints Aircraft navigational system and methods are disclosed for creating aircraft navigational guidepoints during in-flight operations. A digital computer and computer control displays provide dynamic and static display of the aircraft relative to the flight p... | 09/08/1987 |
| 4670757 | Bistatic object location method A method for passively locating in range and azimuth both active, such as radar, and passive objects. The present invention uses existing direction finding equipment located on a platform, such as an aircraft or ship. At the platform, the invention includ... | 06/02/1987 |
| 4642639 | Multichannel DME ranging system A multichannel DME ranging circuit is described which is capable of simultaneous multistation operation. A microprocessor is coupled to control associated peripheral devices and the receiver/transmitter of a DME to produce a multiplexing for receiving fre... | 02/10/1987 |
| 4636958 | Arrangement for receiving TACAN signals A receiver for pulse amplitude modulated TACAN signals having 15 Hz and 135 Hz modulating components and which determines the TACAN bearing angle by calculating the phase shift angles $c;15 and $c;135 of those components of the received signals. The... | 01/13/1987 |
| 4599617 | Method and apparatus for evaluating the range data accumulated by distance measuring equipment This invention discloses a DME which employes an improved technique for validating received replies. The technique employed reduces lock-on time by analyzing all of the range data received within a set time period following the transmission of an interrog... | 07/08/1986 |
| 4583177 | Accurate DME-based airborne navigation system The system described herein uses distance information from aircraft to multiple ground stations of the TACAN, VORTAC, VOR/DME or DME type to determine position of the aircraft to a high degree of accuracy exceeding the normal capabilities of these types o... | 04/15/1986 |
| 4447814 | Digital VOR bearing measurement apparatus A VOR bearing measurement scheme wherein the received 30 hertz reference signal is delayed a fixed time to produce an approximately 90 degree phase shifted reference signal. The reference is multiplied by the phase shifted, itself and the variable signals... | 05/08/1984 |
| 4446464 | Airborne tacan equipment utilizing a logarithmic amplifier Airborne Tacan equipment includes a receiver to receive Tacan signals and to provide an output signal having modulation components containing bearing information. The receiver includes a logarithmic amplifier to preserve the amplitude modulation of the mo... | 05/01/1984 |
| 4413322 | Automatic waypoint area navigation system An area navigation device automatically establishes waypoints along an RNAV course line intersecting with the four cardinal radials of VORTAC stations. For a given VORTAC station, the pilot selects any of the four cardinal radials and is automatically pro... | 11/01/1983 |
| 4409594 | Apparatus for performing radio frequency pulse modulation with automatic modulation control A modulator for RF class C amplifiers particularly suitable for transistor power stages employing FAIL-SOFT. Automatic modulation control operates to independently adjust the gains of a pair of controllable amplifiers whose outputs are then combined, filt... | 10/11/1983 |
| 4385300 | Digital TACAN processor A stand-alone digital processor based system includes a five-output state digital filter provided with magnitude and time data relative to a received TACAN signal. Threshold detection is provided for validating the received signal magnitude. The filter ou... | 05/24/1983 |
| 4197542 | Radio navigation system An electronic navigation system ground station, which may be either an omni-range beacon (such as VOR) or a passive direction finder. A circular array of antenna elements has a feed arrangement which includes switched programming of at least one discrete ... | 04/08/1980 |
| 4106093 | Ground speed deriving circuit A circuit for generating a signal proportional to the ground speed and track angle of an aircraft derives a signal from a node in a coherent or vector filter having a position vector input and output. The filter utilizes at least two integrators which int... | 08/08/1978 |
| 4103300 | Air navigation and landing aid system An air navigation and landing aid system wherein a pair of transponder beacons are located at known positions adjacent an airport runway. The aircraft carries a weather pulse radar system and an antenna for furnishing information affording a navigation ai... | 07/25/1978 |
| 4069412 | Area navigation system There is disclosed an area navigation system including signal averaging and lag compensation circuits to overcome VOR signal propagation instabilities and a meter sensitivity control circuit which decreases the sensitivity of a track angle deviation left-... | 01/17/1978 |
| 4061297 | Approach range monitor An area navigation system capable of operating during an ILS approach to provide the pilot range and bearing with respect to the outer and middle markers for a front course approach, and with respect to the final approach fix and the end of the runway for... | 12/06/1977 |
| 4054880 | Position fixing system utilizing plural commercial broadcast transmissions and having frequency correction A radio navigation, position locating and signaling arrangement employs three operative channels per vehicle for receiving three commercial radio transmissions. Each channel includes feedback circuitry for maintaining a constant phase relationship between... | 10/18/1977 |
| 4029271 | Automatic approach to hover system In a helicopter having an automatic pilot system for controlling the main rotor collective pitch, main rotor longitudinal and lateral cyclic pitch, and tail rotor collective pitch, in response to inputs provided from normal sensors, navigational instrumen... | 06/14/1977 |
| 4017823 | Position control system for a subsea vehicle A position control system, for use in positioning relative to a subsea well a subsea vehicle or a re-entry tool having thrusters, including a Doppler sonar system connected to the vehicle and operable for generating a Doppler pulse train signal having a p... | 04/12/1977 |
| 4012626 | Vertical navigation control system Apparatus for use with an area navigation system wherein the craft is maintained on a predetermined vertical flight path. Specifically, a pitch command signal for controlling the vertical flight of the craft, which is substantially free of discontinuities... | 03/15/1977 |
| 3998412 | Helical vertical path control apparatus for aircraft area navigation system Control apparatus for an aircraft area navigation system provides a vertical path control signal to cause the aircraft to ascend or descend along a helical surface as the craft executes a transition laterally from the inbound course to the outbound course... | 12/21/1976 |
| 3998410 | Apparatus and method for detecting a digital change in data In a DME system, the least significant decade of the present aircraft to ground station distance is maintained encoded in a memory, and an up-down counter maintains a variable count. The complement of the present distance is compared with the present coun... | 12/21/1976 |
| 3992613 | TACAN flying target control system A flying target control system for directing a flying target along a radio eam heading toward a ship under simulated attack according to a preselected altitude and speed profile. The control system utilizes a TACAN transceiver which receives TACAN signals ... | 11/16/1976 |
| 3975731 | Airborne positioning system An airborne positioning system for acquiring range information from at least three distance measuring equipment (DME) stations, including a computer controlled range gate and means for estimating and removing bias errors from range measurements and smooth... | 08/17/1976 |
