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Massachusetts Institute of Technology Patents
Assignee:
Massachusetts Institute of Technology
Address:
Cambridge, MA
No. of patents:
3251
Patents:




Patent Number Title Of Patent Date Issued
RE40691 Encoding decoding and compression of audio-type data using reference coefficients located within March 31, 2009
An audio type signal is encoded. The signal is first divided into bands. For each band, a yardstick signal element is selected. The yardstick may be the signal element having the largest magnitude in the band, the second largest, closest to the median magnitude, or having some other
RE39196 Nanocrystalline apatites and composites, prostheses incorporating them, and method for their pro July 18, 2006
Methods for synthesis of nanocyrstalline apatites are presented, as well as a series of specific reaction parameters that can be adjusted to tailor, in specific ways, properties in the recovered product. Particulate apatite compositions having aveage crystal size of less than 150 nm
RE37932 Supermicrocellular foamed materials December 10, 2002
A supermicrocellular foamed material and a method for producing such material, the material to be foamed such as a polymerplastic material, having a supercritical fluid, such as carbon dioxide in its supercritical state, introduced into the material to form a foamed fluid/material system
RE37410 Controlled local delivery of chemotherapeutic agents for treating solid tumors October 16, 2001
A method and devices for localized delivery of a chemotherapeutic agent to solid tumors, wherein the agent does not cross the blood-brain barrier and is characterized by poor bioavailability and/or short half-lives in vivo, are described. The devices consist of reservoirs which release d
RE37134 Heat exchanger containing a component capable of discontinuous movement April 17, 2001
Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while
RE37053 Particles incorporating surfactants for pulmonary drug delivery February 13, 2001
Improved aerodynamically light particles for drug delivery to the pulmonary system, and methods for their synthesis and administration are provided. In a preferred embodiment, the aerodynamically light particles are made of a biodegradable material and have a tap density less than 0.4 g/
RE36986 Apparatus and methods for measuring permeability and conductivity in materials using multiple wa December 12, 2000
Devices and analytical techniques are disclosed for measuring spatial profiles of complex permeability and conductivity of a material by multiple wavenumber interrogations. Coil array structures are disclosed which define a number of different fundamental wavelengths (or wavenumbers)
RE36478 Processing of acoustic waveforms December 28, 1999
A sinusoidal model for acoustic waveforms is applied to develop a new analysis/synthesis technique which characterizes a waveform by the amplitudes, frequencies, and phases of component sine waves. These parameters are estimated from a short-time Fourier transform. Rapid changes in t
RE36352 High-efficiency, multilevel, diffractive optical elements October 26, 1999
The method utilizes high resolution lithography, mask aligning, and reactive ion etching. In particular, at least two binary amplitude masks are generated. A photoresist layer on an optical element substrate is exposed through the first mask and then etched. The process is then repea
RE36041 Face recognition system January 12, 1999
A recognition system for identifying members of an audience, the system including an imaging system which generates an image of the audience; a selector module for selecting a portion of the generated image; a detection means which analyzes the selected image portion to determine whe
RE35747 Method for determining tissue of origin and presence and extent of cellular abnormalities March 17, 1998
A biochemical procedure for identification and characterization of cells in a biopsy or sample of a body fluid. The method can be used to determine cell type, i.e. epidermal, neuronal; tissue of origin, i.e. breast tissue, liver tissue; and degree of abnormality. The procedure can also b
RE35068 Collapsible gel compositions October 17, 1995
Ionized crosslinked polyacrylamide gels are provided that are capable of drastic volume changes in response to minor changes in solvent concentration, temperature of pH or salt concentration of the solvent. The gels can contain a metal ion.
RE34812 Coupled-cavity Q-switched laser December 27, 1994
A Q-switched laser having a gain medium disposed within a first cavity and a second cavity whose optical path length is adjustable such that the quality of the first resonant cavity is affected. One aspect of the invention is the changing of the physical path length of the second cavity
RE33865 Detector for three-dimensional optical imaging March 31, 1992
The detector includes a focusing lens for focusing pulsed laser light reflected from an object onto a fiber optic array. The fiber optic array is configured to receive a two-dimensional image from the focusing lens and to convert the two-dimensional image into a line image. A streak
RE32782 Method for determining in vivo, bone strength November 15, 1988
A system for establishing, in vivo, the strength of bone in a live being such as, for example, a horse. The system permits determination of the speed of travel of sound through the bone and the strength of the bone is assessed on the basis of said speed of travel.The questions raised in
RE31287 Asynchronous logic array June 21, 1983
An asynchronous logic array capable of directly implementing Petri net specification of digital systems is disclosed. The array can be used in general synthesis of asynchronous digital circuits and systems. The parallel nature of the array gives the realized systems the speed and oth
RE30384 Solar cell August 26, 1980
An improved solar cell designed for optimum efficiency is comprised of a plurality of series connected unit solar cells formed from a common substrate of semiconductor material. Each unit solar cell has spaced elongate sidewalls, and a "dead space" area between adjoining sidewalls of
RE30383 High-intensity, solid-state-solar cell device August 26, 1980
A semiconductor solar cell capable of converting incident radiation to electrical energy at high efficiency includes a plurality of series-connected unit solar cells formed on a common wafer of semiconductor material. The unit solar cells each include a semiconductor substrate of one
RE30336 Solar-cell array July 15, 1980
The invention contemplates a solar-cell construction wherein plural spaced elongate unit cells of an array are formed from a parallel-grooved single wafer of substrate material of a first conductivity type, with adjacent sidewalls of adjacent units at each inter-unit groove formation. In
RE30131 Generating and using coherent optical radiation October 30, 1979
Optical radiation generation and detection using metal-to-metal diode junctions. Coherent optical radiation is generated by using an antenna connected to a metal-to-metal diode junction with non-linear current-voltage characteristics and by coupling to the junction electromagnetic ra
RE29578 Electron tunneling device March 14, 1978
Tunneling electronic devices responsive to infrared and far infrared radiation are formed by overlapping deposits which define ultra-thin dielectric layers (less than aout 10 Angstrom thickness) between metal layers, and contact areas of the order of 1 micron.sup.2 or less. Preferred
D596084 Motorcycle July 14, 2009
7619224 Generation, acceleration, focusing and collection of a high-brightness, space-charge-dominated c November 17, 2009
A high-brightness, space-charge-dominated circular charged-particle beam system includes a flat circular emitter that emits charge particles to form a space-charge-dominated circular charged-particle beam. The space-charge-dominated circular charged-particle beam is emitted from the
7618680 Oxidative chemical vapor deposition of electrically conductive and electrochromic polymers November 17, 2009
Remarkably, disclosed herein is a solvent-less chemical vapor deposition (CVD) method for the oxidative polymerization and deposition of thin films of electrically-conducting polymers. In a preferred embodiment, the method provides poly-3,4-ethylenedioxythiophene (PEDOT) thin films. In
7618381 Wrist and upper extremity motion November 17, 2009
Wrist and upper extremity motion systems and method may include positioning a subject's wrist or upper extremity in a motion device, and actuating one or more motors associated with the device to provide at least one of assistance, perturbation, and resistance to a wrist or upper ext
7617891 Mechanical crawler November 17, 2009
A self-propelled mechanical crawler adapted to move on a medium. One example of such a crawler includes a foot, a wave generator adapted to drive a periodic wave in the foot, and a wave transfer mechanism coupled between the wave generator and the foot. The wave transfer mechanism may
7616826 Removing camera shake from a single photograph using statistics of a natural image November 10, 2009
A computer method and system for deblurring an image is provided. The invention method and system of deblurring employs statistics on distribution of intensity gradients of a known model. The known model is based on a natural image which may be unrelated to the subject image to be de
7616084 Variable reluctance fast positioning system and methods November 10, 2009
The preferred embodiments of the present invention are directed to high bandwidth positioning systems such as fast tool servos (FTS). The applications of this invention include, for example, diamond turning of mold with structured surface for mass production of films for brightness e
7615377 Fluorescein-based metal sensors November 10, 2009
The present invention is directed, in part, to fluorescein-based ligands for detection of metal ions, and methods of making and using the same.
7612346 Non-axisymmetric charged-particle beam system November 3, 2009
The charged-particle beam system includes a non-axisymmetric diode forms a non-axisymmetric beam having an elliptic cross-section. A focusing element utilizes a magnetic field for focusing and transporting the non-axisymmetric beam, wherein the non-axisymmetric beam is approximately
7606777 High-performance vision system exploiting key features of visual cortex October 20, 2009
An artificial visual recognition system and method employ a digital processor and a model executed by the digital processor. The model has a loose hierarchy of layers. Each layer, from a lowest hierarchy level to a top level, provides relatively increasing selectivity and invariance of
7606499 Bidirectional transceiver assembly for POF application October 20, 2009
A bidirectional transceiver assembly includes a VCSEL structure that emits light at a defined wavelength on a substrate structure. A photodetector receives the light. A hole structure is formed on the substrate structure to allow the light from the VCSEL structure to be emitted so as to
7604422 Large-aperture focal plane shutter October 20, 2009
Described is a compact focal plane shutter system adapted for large-format exposure shutters. The focal plane shutter includes at least one multi-segmented screen having multiple rigid blades. Each blade can be moved at a different velocity. By using multiple blades, the rotational i
7603704 Secure execution of a computer program using a code cache October 13, 2009
Hijacking of an application is prevented by monitoring control flow transfers during program execution in order to enforce a security policy. At least three basic techniques are used. The first technique, Restricted Code Origins (RCO), can restrict execution privileges on the basis of th
7603239 Methods and systems for generating peptides October 13, 2009
Antimicrobial peptides are small proteins used by the innate immune system to combat bacterial infection in multicellular eukaryotes. There is mounting evidence that these peptides are less susceptible to bacterial resistance than traditional antibiotics and that they may form the basis
7602858 Digital transmitter October 13, 2009
An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equaliz
7602857 Digital transmitter October 13, 2009
An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equaliz
7601977 Phase-matched terahertz emitter October 13, 2009
Methods and apparatus are disclosed for directing optical radiation to make multiple passes across an extended region of an electro-optic material, where during each pass the electro-optic material converts a portion of the optical radiation into terahertz radiation, and where the op
7601424 Stabilized semiconductor nanocrystals October 13, 2009
A semiconductor nanocrystal associated with a polydentate ligand. The polydentate ligand stabilizes the nanocrystal.
7599876 Electronic market-maker October 6, 2009
Disclosed herein is an automated Electronic Market-Maker, comprising a Market Quality Control Module for generating trading recommendations to maintain market quality; an Inventory Control Module for generating trading recommendations to maintain inventory; a Speculation Module for g
7599584 Planar MID-IR integrated microphotonics October 6, 2009
A planar mid-infrared (mid-IR) integrated microphotonic platform includes at least one laser performing lasing functions. The at least one laser comprises chalcogenide glass. At least amplifier structure is coupled to the at least one laser for performing optical amplification. The at le
7598199 Catalytic nanoparticles for nerve-agent destruction October 6, 2009
The present invention relates to compositions and methods for sorbing (e.g., adsorption and chemisorption) and destroying organophosphate chemical agents. In certain embodiments, the invention contemplates the use of finely divided, modified nanoscale metal oxide particles. In one em
7597950 Nanoparticles having sub-nanometer features October 6, 2009
An article has a surface, at least a portion of which has a local radius of curvature of about 1000 nm or less. For example, the article may be a nanoparticle or a surface, a portion of which has a roughness characterized by a radius of curvature of about 1000 nm or less. A monolayer
7597860 Low current plasmatron fuel converter having enlarged volume discharges October 6, 2009
A novel apparatus and method is disclosed for a plasmatron fuel converter ("plasmatron") that efficiently uses electrical energy to produce hydrogen rich gas. The volume and shape of the plasma discharge is controlled by a fluid flow established in a plasma discharge volume. A plasma
7597692 Microscission processes and procedures October 6, 2009
The present invention relates to microscission methods and devices used for the manipulation or modification of the body tissue by the formation of microconduits in a tissue. The term "microconduit" refers to a small opening, channel, or hole into, or through, a tissue, that allows t
7596158 Method and structure of germanium laser on silicon September 29, 2009
A laser structure includes at least one active layer having doped Ge so as to produce light emissions at approximately 1550 nm from the direct band gap of Ge. A first confinement structure is positioned on a top region of the at least one active layer. A second confinement structure is
7595376 Poly zinc finger proteins with improved linkers September 29, 2009
Polynucleotides encoding chimeric proteins, and methods for their production and use are disclosed. The chimeric proteins comprise a flexible linker between two zinc finger DNA-binding domains, wherein the linker contains eight or more amino acids between the second conserved histidi
7594111 Secure execution of a computer program September 22, 2009
Hijacking of an application is prevented by monitoring control flow transfers during program execution in order to enforce a security policy. At least three basic techniques are used. The first technique, Restricted Code Origins (RCO), can restrict execution privileges on the basis of th
7593644 Synchronization of lasers and RF sources using timing information transfer in the optical domain September 22, 2009
A RF-synchronization system includes a laser that creates pulse trains for synchronization. A modulation means transfers the timing information of the pulse train into an amplitude modulation of an optical or electronic system. A synchronization module changes the driving frequency of th
7592152 Chondroitinase ABC I and methods of analyzing therewith September 22, 2009
The invention relates to chondroitinase ABC I and uses thereof. In particular, the invention relates to recombinant and modified chondroitinase ABC I, their production and their uses. The chondroitinase ABC I enzymes of the invention are useful for a variety of purposes, including de

 
 
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