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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7710708 | Two-axis geomagnetic sensor and method for manufacturing the same A two-axis geomagnetic sensor is disclosed. The two-axis geomagnetic sensor includes a first geomagnetic sensor part including a first wafer and a first geomagnetic sensor on a surface of the first wafer; and a second geomagnetic sensor part including a second wafer... | 05/04/2010 |
| 7411774 | Voltage variable capacitor A charge storage device having a capacitance that is variable by alteration of the relative permittivity of the dielectric positioned between conductive electrodes within the device. The device consists of two conductive plates sandwiching a conductive grid, typical... | 08/12/2008 |
| 7340907 | Anti-condensation control system An anti-condensation control apparatus for a refrigeration device generally includes a sensor module and a control module. The control module receives an input from the sensor module and compares the input to a set point. The control module generates an output indic... | 03/11/2008 |
| 7340952 | Capacitive humidity sensor A capacitive humidity sensor includes a printed circuit board having an insulating substrate on which a circuit section is formed, a pair of electrodes formed on a surface of the insulating substrate to be opposite from each other with a space, and a humidity sensit... | 03/11/2008 |
| 7295126 | Perforated plane moisture sensor A moisture sensing apparatus, system and method. In general, a surface can be provided, and one or more conductor pairs located in a plane of the surface. Each conductor of the conductor pair(s) is insulated from one another. Water droplets forming on the conductor ... | 11/13/2007 |
| 7231727 | Apparatus and method for removing moisture The present invention relates to a moisture removal apparatus and method for accurately detecting moisture generation in an early stage and quickly removing it so as to prevent steam or frost from being formed on glass surfaces of vehicles and industrial devices, an... | 06/19/2007 |
| 7215529 | Capacitive sensor having flexible polymeric conductors A capacitive sensor having a first and a second polymeric conductor are embedded within a non conducting body, wherein the body maintains a fixed separation distance between the first and the second polymeric conductor. The body can include a non conducting web, whe... | 05/08/2007 |
| 7213462 | Humidity sensor and composite sensor having humidity detecting function A humidity sensor includes a resin molding body having a wall portion as a barrage, a chip having at least a humidity sensing function and fixed to a portion of the resin molding body inside the wall portion, and a terminal conductor insert-molded in the resin moldi... | 05/08/2007 |
| 7210333 | Humidity sensor and method of using the humidity sensor A humidity-sensitive porous layer (13) of a humidity-sensitive element section (3) of a humidity sensor (1) is formed of a crystalline phase oxide grains such as Al2O3—SnO2—TiO2 and of a glass phas... | 05/01/2007 |
| 7114848 | Environment sensor An environment sensor (11) for measuring the temperature and humidity can be miniaturized and can respond at high speed. The environment sensor (11) includes a temperature sensing portion (111) having a temperature-sensitive material (1) ... | 10/03/2006 |
| 7092232 | Variable capacitance capacitor, circuit module, and communications apparatus A variable capacitance capacitor has a plurality of variable capacitance elements, using a thin-film dielectric layer whose dielectric constant varies with voltage application, connected in series with one another between the high-frequency signal input and output t... | 08/15/2006 |
| 7032448 | Capacitive humidity sensor A capacitive humidity sensor includes a detection portion and a reference portion. The detection portion includes detection electrodes and a moisture sensitive film. The reference portion includes reference electrodes and a moisture permeation film as a capacitance ... | 04/25/2006 |
| 6997604 | Temperature sensor A temperature sensor comprising: a housing; a thermo-sensitive element housed in the housing for outputting electric characteristics varying with a temperature, as an electric signal; and a pair of lead wires connected at their one-side ends with the thermo-sensitiv... | 02/14/2006 |
| 6840103 | Absolute humidity sensor An absolute humidity sensor for a microwave oven is disclosed. The absolute humidity sensor includes a substrate having a first hole and a second hole in a predetermined region, a membrane formed on the substrate, a humidity sensing element formed on the membrane wh... | 01/11/2005 |
| 6742387 | Capacitive humidity sensor A capacitive humidity sensor includes a pair of opposed electrodes on a substrate. A humidity-sensitive film covers the electrodes. The electrodes are comb-shaped and interdigitated. Humidity is detected based on the capacitance between the pair of electrodes, which... | 06/01/2004 |
| 6724612 | Relative humidity sensor with integrated signal conditioning Methods of and systems providing high reliability relative humidity sensors having integrated signal conditioning are described, providing a series capacitive circuit including a humidity-sensitive dielectric, a common top plate and first and second bottom plates as... | 04/20/2004 |
| 6690569 | Capacitive sensor A sensor, in particular a humidity sensor, comprises a measuring layer (4), the dielectric properties of which depend on a parameter to be measured, e.g. of the humidity of the environmental air. Electrodes (2, 3) are arranged on a substrate (1) side by s... | 02/10/2004 |
| 6647782 | Capacitive humidity sensor A humidity sensor has two detection electrodes located on a semiconductor substrate and a humidity sensitive film. The capacitance of the film changes in response to humidity. The sensor includes a reference capacitor and a feedback capacitor. An electrod... | 11/18/2003 |
| 6628501 | Capacitive moisture sensor A capacitive moisture sensor includes a semiconductor substrate, which has a hole. A silicon oxide film is located to close the hole. A pair of electrodes is located on the silicon oxide film. Each electrode is in the shape of a comb, and the electrodes m... | 09/30/2003 |
| 6507477 | Electrical capacitor An electrical capacitor is discloses which includes a mixture of electrically conductive and non-conductive particles. The particles are intimately mixed so as to provide a random distribution, and the mixture is placed between two parallel conductive pla... | 01/14/2003 |
| 6134953 | Process and device for controlling the water content in products stored in an enclosure A process for controlling the water content in products stored in an enclosure wherein the process includes measuring at at least one point within the product a value which represents a partial pressure of water vapor at the point within the product when ... | 10/24/2000 |
| 5898309 | Method for determining specific material characteristics A method and apparatus for determining specific material characteristics of plastic materials in which the plastic material is disposed between electrodes of a capacitive sensor and the impedance is measured and compared to a reference value, preferably s... | 04/27/1999 |
| 5852368 | Sensor for the measurement of moisture in a flow of material A sensor for the measurement of moisture in a flow of material, especially loose material such as meal material, grains, granulates and similar materials which are to be pressed to form feed pills in presses. The sensor comprises a tube piece of an electr... | 12/22/1998 |
| 5672976 | Wetness sensor for a window of a motor vehicle In a wetness sensor for a window of a motor vehicle, a heating resistor arranged in the window and powered by DC current can be connected to a measuring device for measuring an AC impedance of the heating resistor, in particular the capacitive portion the... | 09/30/1997 |
| 5489808 | Electric circuit substrate apparatus An electric circuit substrate apparatus having a micro-processor for a control of a device is comprised of a substrate, an electric circuit arranged on the substrate and including a rectifier, an electrolysis condenser, a detecting device for detecting th... | 02/06/1996 |
| 5408381 | Capacitance humidity sensor A capacitance humidity sensor according to the invention has a film core which is in contact with a pair of conductive layers bonded to opposite faces of the core. The core is made of a polyimide having a dielectric constant which varies substantially lin... | 04/18/1995 |
| 5296819 | Polymer capacitative moisture sensitive device comprising heating means A moisture sensitive device includes a polymer capacitive moisture sensitive element and a heater. The polymer capacitive moisture sensitive element is formed by sequentially stacking a lower electrode, a moisture sensitive film made of an organic polymer... | 03/22/1994 |
| 5283711 | Capacitive humidity sensor Capacitive humidity sensor comprising a substrate, a moisture-impermeable conducting bottom layer as first capacitor plate, a dielectric layer, and a moisture-permeable conducting top layer as second capacitor plate, and connecting wires associated with t... | 02/01/1994 |
| 5177662 | Capacitance humidity sensor A capacitance humidity sensor according to the invention has a film core which is in contact with a pair of polymeric conductive layers bonded to opposite faces of the core. The core is made of a polymeric material having a dielectric constant which varie... | 01/05/1993 |
| 5161085 | Moisture sensitive element and method of manufacturing the same A moisture sensitive element includes a moisture sensitive film consisting of a polymer obtained by polymerizing and crosslinking a fluorine-containing polyimide oligomer or a polyisoimide oligomer having acetylene as a terminal group and its isomer. The ... | 11/03/1992 |
| 5087480 | Method for manufacturing a moisture permeable electrode in a moisture sensor A moisture sensing element includes a moisture permeable gold electrode film formed on a moisture sensitive polyvinyl alcohol film which is carried by a glass substrate. The moisture permeable gold electrode film is formed by a vacuum evaporation under a ... | 02/11/1992 |
| 5075816 | Capacitive humidity sensor construction and method for manufacturing the sensor The invention concerns a capacitive humidity sensor (6) capable of being connected to a measurement device of dielectric factor and a method for producing the sensor. The sensor comprises a dielectric layer (3), whose dielectric factor changes according t... | 12/24/1991 |
| 5069069 | Moisture-sensitive element for moisture sensors A moisture-sensitive element comprising a moisture-sensitive film which consists of a polymer (such as a polymer in which polyethersulfon is a principal component) whose water sorption amount is between 10 and 40 mg/g at a temperature of 30° C. and a rel... | 12/03/1991 |
| 5050434 | Capacitive humidity sensor A capacitive humidity sensor includes a capacitor with two metallic electrodes 12, 15, with electrode 15 formed of a moisture-permeable metallic layer. A moisture-sensitive polymer film 14 situated between the electrodes serves as a dielectric. The film 1... | 09/24/1991 |
| 5040411 | Windshield moisture sensor A moisture sensor to sense rain on a windshield includes sensor members and leads on the outboard surface of the windshield. The members and leads are uncoated and directly exposed to any moisture accumulation on the sensor. Leads connect the sensor to a ... | 08/20/1991 |
| 5040090 | Capacitive moisture-sensor A capacitive moisture sensor with a dielectric consisting of a moisture sensitive polymer which is mounted between two electrodes fulfills all the requirements of capacitive moisture sensors to a high degree, in particular with regard to a high long-term ... | 08/13/1991 |
| 4965698 | Capacitance humidity sensor A capacitance humidity sensor according to the invention has a dielectric film core which is in contact with a pair of polymeric conductive layers bonded to opposite faces of the core. The dielectric core is made of a polymeric material having a dielectri... | 10/23/1990 |
| 4920451 | Moisture-sensitive element A moisture-sensitive element includes a moisture-sensitive film consisting of a polymer prepared by polymerizing a methacrylate monomer not having a hydroxyl group. A humidity detector using the moisture-sensitive element is also disclosed.... | 04/24/1990 |
| 4909070 | Moisture sensor A moisture sensor for detecting the moisture in a particulate material, the moisture sensor comprising a capacitance sensing probe having a first part with a dielectric coating and a second part, the second part being electrically conductive, physically i... | 03/20/1990 |
| 4893214 | Capacitance type sensitive element and a manufacturing method thereof A capacitance type sensitive element comprises a pair of electrode pairs formed on an insulating substrate and having opposite electrode faces perpendicular or slantingly formed with respect to a face of the insulating substrate; and a sensing material di... | 01/09/1990 |
