Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7333044 | Rocket-powered sensor target assembly A rocket tube for housing a reloadable rocket motor is connected to a spacer element and a wire-rider element. A sensor target for reflecting radar signals is screwably attached to the rocket tube. The sensor target is provided with a plug for effectively sealing on... | 02/19/2008 |
| 7314006 | Nonlethal canister tank round A nonlethal canister tank round comprising a cartridge having a combustible case and containing propellant; a canister projectile attached to the cartridge, the canister projectile being generally cylindrical, comprising high density polyurethane foam and including ... | 01/01/2008 |
| 7253789 | Dielectric resonator antenna There is disclosed a dielectric resonator antenna adapted to resonate in an EH11δ resonance mode, and also a method for the manufacture thereof. The desired resonance mode is achieved by careful positioning of a dielectric resonator (2) on a groun... | 08/07/2007 |
| 7221328 | Radiowave lens antenna device Lens antenna equipment including a hemispherical Luneberg lens made of dielectric, a reflector which has a size larger than the lens diameter and which is to be provided on a face equivalent to a cross-section made by halving a globular shape of the lens, a primary ... | 05/22/2007 |
| 7196655 | System and method for highly directional electronic identification and communication and combat identification system employing the same An antenna for directional electronic communication, a directional communication system, a method of conducting directional communication, a combat identification system and a method of identifying friendly forces. In one embodiment, the antenna includes: (1) a cond... | 03/27/2007 |
| 7179844 | Dielectric resin foam and lens for radio waves using the same It is an object of the present invention to provide a dielectric resin foam which has high and uniform dielectric properties and is preferable for use as various dielectric materials. A dielectric resin foam obtained by expanding a resin composition comprising a syn... | 02/20/2007 |
| 6927725 | System and method for radar detection and calibration A system and method for radar detection and calibration. By measuring the true range of a calibration target on entry to the radar's detection zone, the actual detection capability of the radar in current atmospheric conditions with the actual radar can be determine... | 08/09/2005 |
| 6208288 | Millimeter wave all azimuth field of view surveillance and imaging system A passive millimeter-wave imaging system (10) is disclosed that provides a full 360° instantaneous azimuthal field-of-view (54) image of a scene. The imaging system (10) makes use of a spherical Luneburg lens (12) and a series of millimeter-wave direct d... | 03/27/2001 |
| 6169910 | Focused narrow beam communication system A system for establishing and utilizing a wireless communication system using a lens antenna having a dielectric material lens. The lens focuses output radio frequency (rf) signals into narrow beam rf signals which are directed to a specific receiving com... | 01/02/2001 |
| 5680136 | Electrically adjustable microwave reflector and application as an electromagnetic decoy A microwave radar reflector includes three, substantially planar networks whose reflectivity or transmissivity may be controlled. The three networks are arranged as a trihedron with an open angle. An additional network, whose reflectivity or transmissivit... | 10/21/1997 |
| 5430444 | Radar reflectors A radar reflector comprises a pair of opposed colinear solid dielectric lens reflectors (10) and two corner reflectors (11) between to provide substantially uniform and high reflectivity in the plane of the reflector elements. Radar energy strikes the out... | 07/04/1995 |
| 5170167 | Reflector for electromagnetic energy A lightweight radar reflector comprising two converging lenses (21 and 22) with a reflecting surface (26) applied to the outer convex surface of one of the lenses. The lenses are preferably meniscus lenses provided with peripheral mating flanges (24 and 2... | 12/08/1992 |
| 4989007 | Passive radar augmented projectile (PRAP) The invention disclosed relates to gun-launched target projectiles wherein a radar-augmentor is included to increase the radar cross-section of the projectile to simulate on radar, an actual airborne threat such as aircraft and missiles. The radar augment... | 01/29/1991 |
| 4973965 | Passive radar target A passive radar target comprises a sond lens (50) of substantially uniform dielectric constant, having a reflecting surface (51) integrally formed therewith, the lens being constructed of particulate material having a dielectric constant selected such tha... | 11/27/1990 |
| 4419669 | Controlled scintillation rate decoy A controlled scintillation rate decoy having microwave reflectors for reflecting incident radar energy in a manner to provide the decoy with a selected radar cross-section, and variable electrical impedance control means connected in electrical circuit wi... | 12/06/1983 |
| 4370654 | Apparatus for producing a frequency change of a wage propagating signal The present invention is an apparatus for producing a frequency change of wave propagating energy including microwave radar beams, electro-optical signals, other electro-magnetic signals, acoustic signals, and other wave propagating energy. In the first e... | 01/25/1983 |
| 4366962 | Low drag, light weight towed target A modular target apparatus is described, which is adapted to be towed behind a towing vehicle, typically an aircraft. The modular apparatus includes a fore body, an aft body, and a thrust bearing interconnecting said bodies. The thrust bearing allows pred... | 01/04/1983 |
| 4314249 | Radar reflector with variable electric reflectivity A radar reflector which reradiates identification and other information to a radar station upon reception of electromagnetic radar waves therefrom. The reflector is composed of plural metallic reflector plates isolated from one another with respect to the... | 02/02/1982 |
| 4090198 | Passive reflectance modulator 1. A reflectance modulator exhibiting an omni-azimuttal reflectance pattern comprising a microwave lens for focusing electromagnetic energy, a plurality of reflector means positioned on a focal surface of said lens and including a gaseous plasma, means fo... | 05/16/1978 |
| 4031535 | Multiple frequency navigation radar system A navigation system in which a transmitter-antenna combination radiates two independent signals with a known frequency separation there between. These signals are radiated to an antenna on a navigation marker whereby they are received and directed to a no... | 06/21/1977 |
| 3972043 | Cross-polarizing lens reflector A Luneberg lens with a polarization-sensitive spherical "leaky" reflector cap having conductive strips aligned at a 45° angle to the linear polarization of the incident wave. The ratio of strip width to strip spacing is preferably chosen to reflect back ... | 07/27/1976 |
