Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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 |
| 7326953 | Layer sequence for Gunn diode The invention relates to a layered construction for a Gunn diode. The layered construction comprises a series of stacked layers consisting of a first highly doped nd GaAs layer (3), a graded AlGaAs layer (5), which is placed upon the first h... | 02/05/2008 |
| 7250646 | TFT mask ROM and method for making same There is provided a monolithic three dimensional TFT mask ROM array. The array includes a plurality of device levels. Each of the plurality of device levels contains a first set of enabled TFTs and a second set of partially or totally disabled TFTs. ... | 07/31/2007 |
| 7227173 | Semiconductor devices and methods A method of forming a semiconductor device includes the following steps: providing a plurality of semiconductor layers; providing means for coupling signals to and/or from layers of the device; providing a quantum well disposed between adjacent layers of the device;... | 06/05/2007 |
| 7205562 | Phase change memory and method therefor Briefly, in accordance with an embodiment of the invention, a phase change memory and a method to manufacture a phase change memory is provided. The phase change memory may include a memory material and a first tapered contact adjacent to the memory material. The ph... | 04/17/2007 |
| 7183568 | Piezoelectric array with strain dependant conducting elements and method therefor A structure (and method) for a piezoelectric device, including a layer of piezoelectric material. A nanotube structure is mounted such that a change of shape of the piezoelectric material causes a change in a stress in the nanotube structure. ... | 02/27/2007 |
| 7148543 | Semiconductor chip which combines bulk and SOI regions and separates same with plural isolation regions A semiconductor chip includes a base substrate, a bulk device region having a bulk growth layer on a part of the base substrate, an SOI device region having a buried insulator on the base substrate and a silicon layer on the buried insulator, and a boundary layer lo... | 12/12/2006 |
| 7149246 | Method and apparatus for reducing oscillator pull in a CMOS wireless transceiver integrated circuit A monolithic transceiver integrated circuit that includes a substrate, a transmitter subsystem of one or more subcircuits on the substrate, and a receiver subsystem of one or more subcircuits on the substrate. Also included is a bias current supply coupled to the re... | 12/12/2006 |
| 7063137 | Heat pump with secondary loop air-conditioning system A chiller-condenser is disposed downstream of a condenser and a chiller-evaporator is disposed downstream of the chiller-condenser. A main three-way valve is disposed between the compressor and the condenser for directing flow from the compressor to the condenser in... | 06/20/2006 |
| 6900468 | Indium chalcogenide, gallium chalcogenide, and indium-gallium chalcogenide phase-change media for ultra-high-density data-storage devices Ultra-high-density data-storage media employing indium chalcogenide, gallium chalcogenide, and indium-gallium chalcogenide films to form bit-storage regions that act as photoconductive, photovoltaic, or photoluminescent semiconductor devices that produce electrical ... | 05/31/2005 |
| 6855975 | Thin film diode integrated with chalcogenide memory cell An integrated programmable conductor memory cell and diode device in an integrated circuit comprises a diode and a glass electrolyte element, the glass electrolyte element having metal ions mixed or dissolved therein and being able to selectively form a conductive p... | 02/15/2005 |
| 6806871 | Driver IC, electro-optical device and electronic equipment A liquid crystal driver IC comprising: a power circuit; an electric volume for varying an output voltage from the power circuit; a temperature detector; and a correction table for storing an electric volume control value corresponding to a temperature detected by th... | 10/19/2004 |
| 6768130 | Integration of semiconductor on implanted insulator A method of forming a semiconductor on insulator structure in a monolithic semiconducting substrate with a bulk semiconductor structure. A first portion of a surface of the monolithic semiconducting substrate is recessed without effecting a second portion of the sur... | 07/27/2004 |
| 5941499 | Sealing valve, in particular used in the catheter technique The invention concerns a sealing valve which comprises a valve body (1) on which a sealing cylinder (8) is mounted. The sealing cylinder (8) contains a sealing stopper against which a pressure piston (18) abuts. A lever arm (23), which is loaded in terms ... | 08/24/1999 |
| 5914508 | Two layer hermetic-like coating process for on-wafer encapsulation of GaAs MMIC's A microwave system encapsulated by two layers. The first layer is an arylcyclobutene polymer having a thickness greater than the tallest component of the system and only located in predetermined areas. Overlaying the polymer and other preselected areas of... | 06/22/1999 |
| 5329257 | SiGe transferred electron device and oscillator using same This invention is a three layer Six Ge1-x structure formed on a silicon substrate in which a thin, lightly doped Six Ge1-x layer is formed between two heavily doped Six Ge1-x layers. The in... | 07/12/1994 |
| 4789887 | Controlling oscillator A voltage controlled oscillator includes a VCO chip that is a monolithic circuit with a Gunn diode and varactor diode intercoupled by a resonant circuit. A detector/discriminator/power divider chip is coupled to the VCO chip through a directional coupler ... | 12/06/1988 |
| 4380020 | Active high frequency semiconductor device with integral waveguide An active semiconductor device, such as a Gunn effect device, capable of operation at extremely high frequencies, fabricated in situ on a substrate that also serves as a dielectric waveguide to propagate energy from the device. In the embodiment disclosed... | 04/12/1983 |
| 4086501 | Planar transferred electron logic device with improved biasing means A planar transferred electron logic device comprising a substrate of substantially insulating material and a layer of semiconductor material which exhibits a differential negative resistance through the "transferred electron effect" upon application of an... | 04/25/1978 |
| 3991328 | Planar transferred electron logic device A planar transferred electron device is biased such that the voltage across the anode and cathode electrodes is above that of a threshold voltage in the presence of which the device is characterized by a transfer of electrons from a high to a low mobility... | 11/09/1976 |
| 3964060 | Analog-to-digital converters utilizing gunn effect devices A parallel or serial analog-to-digital converter utilizing both Gunn effect devices and field effect transistors. The converters are based on a differential pair of amplifiers consisting of two or more Gunn effect devices, one of which is biased close to ... | 06/15/1976 |
