Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7663549 | Incoming direction estimation apparatus An incoming direction estimation apparatus estimates an incoming direction of a radar wave using three or more sensors or antennas simultaneously. An arithmetic expression for estimating an incoming direction of a radar wave is configured as sin−1((1/2Ï... | 02/16/2010 |
| 7436359 | Method for single satellite geolocation of emitters using an ambiguous interferometer array A method of locating a terrestrial emitter of electromagnetic radiation in the midst of a plurality of emitters in a satellite in orbit about the earth which utilizes a location estimation and location probability determination process with respect to each possible ... | 10/14/2008 |
| 7428450 | Method and system for using a database and GPS position data to generate bearing data A method and system for providing a bearing from a vehicle to a transmitting station are described. The method includes accessing a database to obtain transmitter position information for the transmitter, obtaining vehicle position information based on a GPS signal,... | 09/23/2008 |
| 7427953 | Wireless communication apparatus for determining direction of arrival information to form a three-dimensional beam used by a transceiver A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays... | 09/23/2008 |
| 7301497 | Stereo display for position sensing systems A method for display of radar data includes performing a first radar scan to obtain, for at least one object (24), a first range reading, a first azimuth reading, and a first altitude reading. A second radar scan is then performed to obtain, for the at least ... | 11/27/2007 |
| 7260231 | Multi-channel audio panel A method and apparatus for providing improved intelligibility of contemporaneously perceived audio signals. Differentiation cues are added to monaural audio signals to allow a listener to more effectively comprehend information contained in one or more of the signal... | 08/21/2007 |
| 7233288 | Receiver for a position-finding system with improved sensitivity A receiver (1) of a position-finding system comprises a calculation unit (6, 7, 8) for calculation of a statistical value (Λ) on the basis of a received signal, and a detector unit (9) for comparison of the statistical value (Λ) with a thresho... | 06/19/2007 |
| 7224311 | System and method for visualization of attitude and attitude/position dependent data A system and method for visualization of attitude dependent data is disclosed. An attitude sphere is defined around an object of interest located at the center. Grid points are defined on the surface of the attitude sphere to represent directions. An attitude depend... | 05/29/2007 |
| 7221950 | Auto sensing home base station for mobile telephone with remote answering capabilities The present invention discloses in one embodiment a mobile telephone capable of communicating with a home base station through radio signals. The mobile telephone registers with a home base station before beginning to communicate with the home base station. The home... | 05/22/2007 |
| 7194083 | System and method for interfacing plain old telephone system (POTS) devices with cellular networks A system and method for interfacing plain old telephone system (PATS) devices with a cellular network is presented. In a broad sense, the system includes an interface that bridges the POTS devices with the cellular network. The interface is configured to convert POT... | 03/20/2007 |
| 7158079 | Simple device and method to return a user to a location A location apparatus for returning to a user to a location including a system unit configured to compute a location using radio signals, a user interface unit having a display area and first and second buttons, a memory unit, and a computational unit configured to i... | 01/02/2007 |
| 7149514 | Cellular docking station A system for communicating with the user of a cellular telephone via the cellular mobile radio (CMR) system and the public switched telephone network (PSTN). A communications interface appends the telephone exchange number of an outgoing communication to include an ... | 12/12/2006 |
| 7130609 | Wireless backup telephone device and associated support system A wireless telephone backup device for landline telephone equipment that may be located on the customer side of the landline service connection, typically in a restricted access location, such as an attic, basement, or utility closet. An interconnection circuit in t... | 10/31/2006 |
| 7116272 | Direction and distance finder for locating distress signals The present invention relates to a system and method for locating the direction and distance to a RF signal source from an avalanche beacon to find an avalanche victim. The system and method includes a RF signal locator and a graphical display residing on the signal... | 10/03/2006 |
| 7106251 | Receiver in a position-finding system and method for position-finding with increased sensitivity The invention relates to a receiver in a position-finding system, having a calculation unit for calculating a statistical value from a received signal, and a detector unit for comparing the statistical value with a threshold value and for determining whether the sig... | 09/12/2006 |
| 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 |
| 7084812 | Method and device for tracking the directions-of-arrival of radio waves L overlapping forward subarrays with {overscore (q)}(≧q) antenna elements are formed with, where q is the number of desired signals, a cyclic correlation matrix is formed from the cyclic correlations between the received signals of L forward subarrays and a receiv... | 08/01/2006 |
| 7006935 | Synchronous vector measuring device A synchronous vector measuring device can measure an absolute phase angle of a synchronous vector excellent in continuous numerical stability at high speed and with high accuracy in a noisy electric power system. A voltage measuring part measures the voltage of the ... | 02/28/2006 |
| 6996420 | Radio communication system, mobile terminal unit thereof, and azimuth determining method Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section... | 02/07/2006 |
| 6992622 | Wireless communication method and antenna system for determining direction of arrival information to form a three-dimensional beam used by a transceiver A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays... | 01/31/2006 |
| 6933889 | Direction and distance finder The present invention relates to a system and method for locating the direction and distance to a RF signal source, primarily for search and rescue. The system and method includes a RF signal locator and a graphical display residing on the signal locator. The receiv... | 08/23/2005 |
| 6922170 | Methods and apparatus for determining a direction of arrival in a wireless communication system Methods and apparatus are provided for determining a direction of arrival (DOA) (46) of a Radio Frequency (RF) signal (32) transmitted by a remote unit (22) in a wireless communication system (20). The methods comprise receiving the RF si... | 07/26/2005 |
| H2109 | Passive microwave direction finding with monobit fourier transformation receiver and matrix coupled antenna A passive instantaneous microwave signal frequency identifying and angle of arrival identifying system employing a beam steering multiple element antenna coupled through a Butler matrix to a plurality of simplified Fourier transformation radio receivers wherein unit... | 09/07/2004 |
| 6731955 | Radio communication system, mobile terminal unit thereof, and azimuth determining method Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section... | 05/04/2004 |
| 6633813 | Navigation system for supplementary representation of directional information The invention relates to a navigation system for a land vehicle having a measuring arrangement for supplying position, direction and/or distance data, having a data source arrangement for supplying navigation data, having an input arrangement at least for... | 10/14/2003 |
| 6542120 | Solar powered GPS device A solar powered GPS device for receiving GPS signals transmitted from GPS satellites in order to determine a time of day. The solar powered GPS device includes a housing that has an interior. A GPS assembly is mounted in the housing for receiving GPS sign... | 04/01/2003 |
| 6292137 | Direction indicating compasses A portable compass comprises a body (18) and a compass needle (22) mounted on the body for indicating North/South. A bearing signal representing a required bearing is received, for example from a GPS receiver, and a display (30) responsive to the bearing ... | 09/18/2001 |
| 6202035 | System for determining time or direction for prayer The present invention relates to a device for determining a time and/or direction for prayer, comprising: receiving means for receiving signals indicative of a position on or above the earth; computing means for computing a time for prayer on the basis of... | 03/13/2001 |
| 6185157 | Timepiece including a GPS receiver, arranged in particular, for indicating the direction of a "target" location A timepiece (7) including hands (4, 5), direction determining means (10, 11, 14, 12) including data input means (14) arranged for inputting the geographical coordinates of a "target" location in data processing means (12). This timepiece is characterized ... | 02/06/2001 |
| 6097315 | Multi-indicator aviation pilot collision alert A collision alert system employs combined binaural acoustic effects combined with optical indicators to direct the attention of a person in a desired direction. The pilot utilizes normal delay and acoustic modification of high frequencies to determine rou... | 08/01/2000 |
| 6069585 | Personal direction finding apparatus A personal direction finding apparatus for determining the direction to be followed in order to reach a predetermined spot which includes a headset provided with two earphones and a circuit for generating a track error signal. The circuit includes a compa... | 05/30/2000 |
| 5905464 | Personal direction-finding apparatus A personal direction finding apparatus for sensing electromagnetic, infrared or ultrasound radiation from a source (S) to determine the direction of the source or generate a virtual sound environment. The apparatus is characterized in that it comprises a ... | 05/18/1999 |
| 5861846 | Aviation pilot collision alert A collision alert system employs binaural acoustic effects to direct the attention of a person in a desired direction. In one embodiment, the angular location of a possible collision risk is detected to energize one of a plurality of acoustic generators s... | 01/19/1999 |
| 5831260 | Hybrid motion tracker A hybrid motion tracker captures the motion of a person. Magnetic field sensors and optical sources are placed on a person, each located on different limbs. A fixed transmitter emits electromagnetic energy and infrared light is transmitted from the optica... | 11/03/1998 |
| 5652578 | Home base directional indicator A method and apparatus for campers, hikers, and hunters enjoying the out-of-doors and nature in the wilderness is disclosed. In the preferred embodiment of the invention the transmitter is adapted to be plugged into the cigarette lighter in a vehicle and ... | 07/29/1997 |
| 5587718 | Method for discovering and designating air targets An automatic apparatus and relevant method for discovering and designating air targets constituted by a transmitter assembly which can be associated with a radar and connected via radio with a portable receiver assembly. The portable receiver assembly is ... | 12/24/1996 |
| 5568154 | System and a method for the instantaneous determination of the frequencies and angles of arrival of simultaneously incoming RF signals A system for the instantaneous determination of the frequencies and angles of arrival of a plurality of simultaneously incoming signals. The system includes beam network matrix for receiving the simultaneously incoming signals, the matrix providing one or... | 10/22/1996 |
| 5543802 | Position/navigation device and method A position/navigation device (10) and method is disclosed wherein a waypoint apparatus (11-14, 18, 43) sequentially designates and stores a continuous ordered sequence of n waypoints corresponding to positions of the device (10). Route and route reversal ... | 08/06/1996 |
| 5534872 | Portable radio signal detecting system In a radio signal detecting system, an antenna is rotatably mounted on a wrist watch type case, and this antenna is manually rotated to receive a radio signal reflected from a target to be distance-measured every time the antenna is rotated by a preselect... | 07/09/1996 |
| 5406291 | Passive emitter location system A passive emitter location system is capable of performing emitter location autonomously from a single airborne observation platform and includes a bearing measurement system, a system for measuring doppler induced frequency shifts, and means for estimati... | 04/11/1995 |
