Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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 |
| 7495611 | Method for determining signal direction using artificial doppler shifts A method for determining the direction of an incoming signal is provided in which each of a plurality of receivers arranged in a linear array is sampled in sequence to simulate a single receiver moving along an aperture defined by the linear array at a simulated spe... | 02/24/2009 |
| 7292179 | Instantaneous passive range finding A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two points on the platform in a common time sample; detecting the received... | 11/06/2007 |
| 7251455 | Techniques for antenna tracking A method estimates a signal to noise ratio (SNR) of a received direct sequence spread spectrum (DSSS) signal. Using the estimated SNR, a control signal is determined that is suitable for modifying a position of a directional antenna. The control signal may be used t... | 07/31/2007 |
| 7190319 | Wave antenna wireless communication device and method A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna may be in the form of a polygonal, elliptical curve and/or coil shape. The wireless communication device is coupled to the w... | 03/13/2007 |
| 7093345 | Wave antenna wireless communication device and method A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is curved in alternating sections. The wireless communication device is coupled to the wave antenna to p... | 08/22/2006 |
| 7085333 | Constant-phase, gain-controlled amplification circuit An amplification circuit (10) is used in a radio receiver (12) to achieve both constant phase shift over the gain range and low intermodulation. A gain-controlled amplifier (16) is desirably optimized for good fidelity, even if at the expense of... | 08/01/2006 |
| 7079987 | Tunable filter device for spatial positioning systems A device for spatial positioning systems includes a programmable measurement filter that is dynamically tuned by the device signal processing unit. The signal processing unit analyzes available data including the measurement signal to determine the likelihood that a... | 07/18/2006 |
| 7054739 | Radio navigation system Navigation apparatus that may include a radio receiver, at least one directional antenna communicatively coupled to the radio receiver, and a navigation computer including a memory and a processor. The navigation computer may be communicatively coupled to the radio ... | 05/30/2006 |
| 6914559 | Direction finding method and system using digital directional correlators In an interferometer system, a revolving antenna array is used to sufficiently resolve all ambiguities in determination of frequency and direction of arrival of a wave-front. The frequency and direction of arrival are determined by matching predicted phase differenc... | 07/05/2005 |
| 6661378 | Active high density multi-element directional antenna system Active high density multi-element antenna system [DS] for radiolocation of RF target radiation has a processor-controlled antenna array [CAA] having rings [R1, R2, R3] concentric about a central axis to define arcuate sectors Sn about the centr... | 12/09/2003 |
| 6459410 | Communication system having a rotating directional antenna A signal transmission system comprising a transmitter, a rotating transmitting antenna connected to the transmitter, a receiver, and a receiving antenna connected to the receiver. A controller connected to the transmitter is adapted to control the transmi... | 10/01/2002 |
| 5896106 | Method for determining the roll attitude of a rolling flying object In a method for determining the roll attitude of a rolling flying object having a radio receiver, in particular for guiding a ballistic flying projectile/rocket having roll compensation, the aim is to determine a line of sight between a transmitting sourc... | 04/20/1999 |
| 5859612 | Method for using an antenna with a rotating beam for determining the position of a mobile subscriber in a CDMA cellular telephone system A method for determining the position of a mobile station within a cellular telephone system having a plurality of base stations. A signal is transmitted from a rotating antenna. The rotating antenna has a beam which rotates around a cell in the cellular ... | 01/12/1999 |
| 5574467 | Doppler positioning using non-planar movement of transmitting source and receiving source Methods and systems for determining a position and an orientation utilize a radio frequency signal transmitted from an effective source location which moves along a first closed, non-planar path. The closed, non-planar path has a plurality of local extrem... | 11/12/1996 |
| 4368470 | Radio direction finder A radio direction finder, which is designed to determine the direction of arrival of a radio wave by causing the rotation of a directional antenna arrangement or a goniometer, to which the output of the directional antenna arrangement is coupled, or rotat... | 01/11/1983 |
| 4276550 | Scan pattern estimator for an electromagnetic sensor A scan pattern estimator is used in a scanning electromagnetic sensor system in which electromagnetic radiation is repetitively scanned and sensed for a plurality of scan cycles. The first incoming scan pattern is transmitted to a summer (42) that produce... | 06/30/1981 |
| 4173762 | Reference signal generating apparatus Apparatus for generating elevation and azimuth reference signals for use in demodulating a tracking error signal to provide elevation and azimuth error components for use in adjusting the position of a tracking conical scan radar antenna, includes a templ... | 11/06/1979 |
| 4115776 | Adaptive gain control for radiometric target tracking system The improved radiometric target seeking system incorporates automatic gain control features including phase tracking automatic gain and automatic gain scan amplitude controls in a system which is basically a dual-axis, gimballed, conical-scan radiometric ... | 09/19/1978 |
| 4012740 | Radio-frequency direction-finding arrangement A scanning radio-frequency direction finder which includes two synchronously scanned beams (antenna patterns) having their boresite (symmetry) axes angularly offset by a predetermined amount, either physically or by control of time of operation. A first o... | 03/15/1977 |
