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Apti Inc. Patents
Assignee:
Apti Inc.
Address:
Washington, DC
No. of patents:
25
Patents:












Patent Number Title Of Patent Date Issued
6733439 Centering mechanism for probe May 11, 2004
A centering mechanism accurately centers a probe as it moves through a pathway having a changing shape, diameter, and direction. More specifically, the invention provides a probe centering device that includes a ring shaped resilient balloon, a front stopper that fixes a location of
6606932 Method and apparatus for neutralization of mines and obstacles August 19, 2003
The invention provides a method and apparatus for neutralizing mines and obstacles that can quickly and efficiently clear a specified surf zone without human intervention. In a preferred embodiment, the invention utilizes firing tubes including a combustion chamber, a mechanism for s
6591731 Method and apparatus for penetrating hard materials using a energetic slurry July 15, 2003
A method and apparatus for drilling and penetrating hard materials utilizes a high velocity gun system that fires multiple shots of a projectile and an energetic slurry at the surface of the material to be penetrated. The penetrating device includes one or more firing barrels that are lo
6529769 Apparatus for performing hyperspectral endoscopy March 4, 2003
A hyperspectral imaging endoscopy apparatus is provided that utilizes spectral technology to acquire, process and exploit gastroscopic data. The apparatus allows for real time anomaly detection and identification. The apparatus includes an endoscope, a spectrometer and a processing unit
6472950 Broadband coupled-line power combiner/divider October 29, 2002
A broadband coupled-line N-way power combiner is presented for combining N RF signals into a common load. This combiner includes N.gtoreq.2 input ports, a common output port, and N identical at least two-conductor coupled transmission lines, and N isolating resistors. Each of these t
6466021 Deep underground imaging utilizing resistivity regularization for magnetotelluric processing October 15, 2002
A method and apparatus for imaging deep underground objects utilizes the application of a spectral regularization routine that is applied to measured data prior to the application of an inversion routine to measured surface impedances to map subsurface conductivity. Specifically, mea
6405628 Method and apparatus for penetrating hard materials June 18, 2002
A method and apparatus for drilling and penetrating hard materials utilizes a high velocity gun system that fires multiple shots of a projectile and an energetic slurry at the surface of the material to be penetrated. The penetrating device includes one or more firing barrels that are lo
6363853 Electrically initiated distributed igniter April 2, 2002
An electrically initiated distributed igniter (EIDI) system combines most of the advantages of conventional pyrotechnic igniters with those of ETC planar igniters without the disadvantages of either. The EIDI system lends itself to precise timing control of multiple electric circuits, em
6324956 Method and apparatus for neutralization of mines and obstacles December 4, 2001
The invention provides a method and apparatus for neutralizing mines and obstacles that can quickly and efficiently clear a specified surf zone without human intervention. In a preferred embodiment, the invention utilizes firing tubes including a combustion chamber, a mechanism for s
5953119 Optical shutter assembly for trace element detector September 14, 1999
A shutter assembly for a trace element detector includes a shutter wheel having at least one window, and a drive mechanism coupled to the shutter wheel, wherein the drive mechanism rotates the shutter wheel to move the window between at least an outlet port of the shutter assembly and a
5883602 Wideband flat short foci lens antenna March 16, 1999
A wideband lens antenna lens of reduced thickness includes a lens antenna constructed of a flat inhomogeneous dielectric plate. A radiation source is located on one side of the dielectric plate and a reflector is located on another side of the dielectric plate opposite the radiation sour
5808349 Magnetized photoconductive semiconductor switch September 15, 1998
A strong magnetic field is applied to a photoconductive semiconductor switch to make the opening time of the switch independent of the recombination time of the photoionized semiconductor. As a result, the switch is capable of shaping current pulses with the fidelity of an illuminati
5796372 Folded cross grid dipole antenna August 18, 1998
A folded crossed grid dipole antenna element includes one or more partially or fully conductive areas in the antenna element. The conductive areas are defined by a group of conductors of the antenna element. In a further configuration, upper and lower tiers of a conventional antenna elem
5293176 Folded cross grid dipole antenna element March 8, 1994
A wide bandwidth, wide scan, antenna array element provides an active element impedance close to 350 ohms over a bandwidth approaching one octave in a periodic equilateral triangular array lattice. The two balanced feed inputs to each element may be phased to produce any desired pola
5218374 Power beaming system with printer circuit radiating elements having resonating cavities June 8, 1993
A system and method for "power beaming" energy from a source at high frequencies and rectifying such energy to provide a source of DC energy is disclosed. The system operates at a frequency of at least 10 GHz and incorporates a rectenna array having a plurality of rectenna structures
5202689 Lightweight focusing reflector for space April 13, 1993
An adjustable focal length reflector for operation in space includes a membrane having a reflective surface. The membrane is subjected to incident radiation pressure. An assembly is located at the perimeter of the membrane to exert force on the membrane to counteract the incident rad
5068669 Power beaming system November 26, 1991
A system and method for power beaming energy from a source at high frequencies and rectifying such energy to provide a source of DC energy is disclosed. The system operates at a frequency of at least 10 GHz and incorporates a rectenna array having a plurality of rectenna structures t
5041834 Artificial ionospheric mirror composed of a plasma layer which can be tilted August 20, 1991
This invention relates to generation of a Artificial Ionospheric Mirror (AIM), or a plasma layer in the atmosphere. The AIM is used like the ionosphere to reflect RF energy over great distances. A tiltable AIM is created by a heater antenna controlled in phase and frequency. The heater
5038664 Method for producing a shell of relativistic particles at an altitude above the earths surface August 13, 1991
A method for establishing a region of a high density, high energy plasma at an altitude of at least about 1500 kilometers above the earth's surface. Circularly polarized electromagnetic radiation is transmitted at a first frequency substantially parallel to an earth's magnetic field line
4999637 Creation of artificial ionization clouds above the earth March 12, 1991
A method for forming a cloud of artificial ionization above the earth by initially heating the resident plasma at a desired altitude with electromagnetic radiation having a frequency approximately the same as that of the ambient plasma. As the plasma frequency increases due to heatin
4954709 High resolution directional gamma ray detector September 4, 1990
A high resolution directional gamma ray detector includes a thin piece of foil, such as tantalum, which reacts with gamma rays incident to the edge of the foil to generate electron/positron pairs. Gamma rays originating from directions other than a direction of interest are shielded from
4873928 Nuclear-sized explosions without radiation October 17, 1989
A method for producing a high yield explosion without radioactive fallout comprising filling an expendible structure with an explosive mixture of a combustible gas (e.g. methane) and an oxidizer gas (e.g. oxygen) and then detonating said mixture.
4817495 Defense system for discriminating between objects in space April 4, 1989
A defense system and a method for discriminating between armed re-entry vehicles and unarmed objects which are in close proximity of each other. The re-entry vehicles and the unarmed objects are bathed in a cloud of relativistic electrons with the resulting signatures from heavy objects,
4712155 Method and apparatus for creating an artificial electron cyclotron heating region of plasma December 8, 1987
A method and apparatus altering a region of plasma that lies above the earth's surface at altitudes (e.g. below 50 kilometer) where the collison rate of the electrons in the plasma is originally greater than the cyclotron frequency of the electrons. First, artificial magnetic lines of
4686605 Method and apparatus for altering a region in the earth's atmosphere, ionosphere, and/or magneto August 11, 1987
A method and apparatus for altering at least one selected region which normally exists above the earth's surface. The region is excited by electron cyclotron resonance heating to thereby increase its charged particle density. In one embodiment, circularly polarized electromagnetic ra

 
 
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