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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 |
| 8141428 | High pressure sensor A combined pressure and temperature sensor comprising a tubular member 3 of circular cross section having a closed end and an open end, the open end, in use, connecting to a pressurized environment such that the interior of the tubular member is exposed to th... | 03/27/2012 |
| 7810395 | Ultrasonic pressure sensor and method of operating the same An ultrasonic pressure sensor and a method of detecting ultrasonic pressure. In one embodiment, the ultrasonic pressure sensor includes: (1) an interferometer having a reference arm and a signal arm that includes a probing fiber, the probing fiber having a reflectiv... | 10/12/2010 |
| 7716991 | Apparatus for measuring pressure using acoustic impedance variation The present invention relates to an apparatus for measuring pressure inside a predetermined vessel based on the principle that the transmitting efficiency of ultrasonic waves is changed by acoustic impedance variation according to an internal pressure. The apparatus... | 05/18/2010 |
| 7694571 | Pressure transponder with surface acoustic wave sensor The invention relates to a pressure sensor, the measuring cell of which is provided with at least one membrane for the protection of the pressure-sensitive element and a measuring chamber, filled with pressure medium, in which the pressure-sensitive element is house... | 04/13/2010 |
| 7415883 | Method for protecting resonating sensors and open protected resonating sensors A protected resonating sensor may include at least one resonating sensor unit, each sensor unit has one or more vibratable members. The protected sensor includes at least one body of gel for protecting the vibratable member(s) of the sensor. The gel may be disposed ... | 08/26/2008 |
| 7380459 | Absolute pressure sensor An absolute pressure sensor is provided comprising a vibration sensing element such as a piezoelectric element disposed on a vibratable seal. The seal is disposed between two gas spring chambers which are maintained at substantially ambient pressure. The resonant vi... | 06/03/2008 |
| 7377173 | Hydrostatic pressure determination in a high-pressure a reservoir (common rail) by means of ultrasonic echo time measurement The invention relates to an economical pressure measuring device as well as to a favorable method for pressure determination, with which a pressure measurement can be performed from outside the high-pressure container. To that end, the device comprises an ultrasound... | 05/27/2008 |
| 7377175 | Sensor having a diaphragm A sensor hard to break and capable of improving sensitivity is obtained. This sensor comprises an electrode plate and a diaphragm, opposed to the electrode plate, including a first elastic film arranged on a central portion and a second elastic film, arranged at lea... | 05/27/2008 |
| 7377168 | Wireless sensor antenna configuration Many sensors could be used in a passive wireless mode. These include RLC, acoustic wave and magneto-elastic sensors. These types of sensors are designed to exhibit a change in fundamental frequency when exposed to environmental factors such as temperature, pressure,... | 05/27/2008 |
| 7353710 | Pressure sensor device with surface acoustic wave elements Thickness of a pressure-detecting piezoelectric substrate (2) that is thinner than that of a supporting piezoelectric substrate (3) and that has a surface acoustic wave element for pressure detection (7a) on its lower surface is mounted o... | 04/08/2008 |
| 7334484 | Line pressure measurement using differential pressure sensor A pressure sensor assembly for sensing a pressure of a process fluid includes a sensor body having a cavity formed therein to couple to a process fluid pressure. A deflectable diaphragm in the cavity deflects in response to the first and second process fluid pressur... | 02/26/2008 |
| 7331236 | Pressure sensor A sensor and insertion assembly 2 is used for intravascular measurement of pressure in a living body. The assembly includes, a sensor chip 6 having a substrate body 8 with a recess covered by a pressure sensitive film 10 thereby forming a... | 02/19/2008 |
| 7327068 | Sensors and related devices and methods Sensors that include SAW devices, related methods, and related devices. Many embodiments are included. Some of the present sensors include an inlet structure; a mounting structure that is spaced apart from the inlet structure, the mounting structure having a top sur... | 02/05/2008 |
| 7318673 | Temperature control system for food items The invention relates to a control system of the chilling process of the temperature of food items at values near but above 0° C. that prevents surface freezing of a food item. The surface freezing can be foreseen due to a mathematical relationship that is a functi... | 01/15/2008 |
| 7302202 | Cooling system and image forming apparatus with cooling system The present invention provides a cooling system including: a cold air generator which supplies cold air into a case of an apparatus; a wireless temperature sensor which is provided near at least one module constituting the apparatus and sends temperature data as a r... | 11/27/2007 |
| 7290454 | Pressure flow sensor systems and pressure flow sensors for use therein A differential pressure flow sensor system comprises a disposable flow sensor which has upstream and downstream pressure sensing devices for detecting a differential pressure in a flow channel. Each sensing device comprises a diaphragm, a capacitor and an inductor e... | 11/06/2007 |
| 7287431 | Wireless oil filter sensor A wireless oil filter sensing system includes an oil filter and a sensing mechanism that is connectable to the oil filter. The sensing mechanism includes one or more acoustic wave sensing elements and at least one antenna that communicate with the acoustic wave sens... | 10/30/2007 |
| 7263892 | Passive tire pressure sensor and method A surface acoustic wave device includes a micro-machined pressure transducer for monitoring tire pressure. The device is configured having a micro-machined cavity that is sealed with a flexible conductive membrane. When an external tire pressure equivalent to the ca... | 09/04/2007 |
| 7246522 | Methods and apparatus for multi-parameter acoustic signature inspection A multiparameter acoustic signature inspection device and method are described for non-invasive inspection of containers. Dual acoustic signatures discriminate between various fluids and materials for identification of the same. ... | 07/24/2007 |
| 7242283 | Automobile steering lock with an alarm An anti-theft automobile steering wheel lock with an alarm includes an alarm and a lock body. The alarm set fixed on the lock body consists of a circuit board, a buzzer and a battery base. The circuit board possesses a microphone sensor, a vibrating sensor and a war... | 07/10/2007 |
| 7228742 | Pressure measuring system for vacuum chamber using ultrasonic wave Disclosed is a pressure measuring system for a vacuum chamber, in particular, a pressure measuring system for a vacuum chamber using ultrasonic wave. In this regard, there is provided a pressure measuring system for a vacuum chamber using ultrasonic wave, comprising... | 06/12/2007 |
| 7198981 | Vacuum sealed surface acoustic wave pressure sensor A vacuum sealed SAW pressure sensor is disclosed herein, which includes a sensing element configured as a SAW device (e.g., SAW resonator or SAW delay line) supported by a thin diaphragm. The substrate material can be implemented as a quartz wafer (i.e., a “baseâ€... | 04/03/2007 |
| 7165455 | Surface acoustic wave sensor methods and systems Sensor systems and methods are disclosed herein, including a sensor chip, upon which at least two surface acoustic wave (SAW) sensing elements are centrally located on a first side (e.g., front side) of the sensor chip. The SAW sensing elements occupy a common area ... | 01/23/2007 |
| 7165298 | Method of making a surface acoustic wave device A surface acoustic wave die system and method are disclosed herein, including a surface acoustic wave sensor comprising one or more surface acoustic wave die disposed and hermetically sealed between a base and a cover. An adhesive is generally for securing one or mo... | 01/23/2007 |
| 7146861 | Disposable and trimmable wireless pressure sensor A disposable pressure sensor includes a substrate and a pressure diaphragm formed upon the substrate. A sensor coil can be provided, comprising a capacitor and an inductor formed on the substrate and surrounded by the pressure diaphragm. The ferrite core is located ... | 12/12/2006 |
| 7148611 | Multiple function bulk acoustic wave liquid property sensor A multifunction sensor based on a bulk acoustic wave (BAW) device can be used to obtain measurements of a liquid's corrosivity, viscosity, and conductance. A front electrode and a back electrode can be used to excite vibrations in a piezoelectric substrate. Vibratio... | 12/12/2006 |
| 7140261 | Acoustic wave flow sensor An acoustic wave flow sensor is disclosed, which includes a sensor substrate and an acoustic wave diaphragm etched upon the sensor substrate, wherein mechanical stress or strain is concentrated in the acoustic wave diaphragm. One or more interdigital transducers can... | 11/28/2006 |
| 7136683 | Surface acoustic wave sensor and radio frequency identification interrogator fixture A wireless sensor fixture system and method are disclosed in which an antenna block is provided that includes a plurality of grooves, wherein such grooves maintain a plurality of antennas located on a portion of the antenna block. A top locator block can be position... | 11/14/2006 |
| 7134319 | Acoustic wave sensor with reduced condensation and recovery time An acoustic wave sensor apparatus is disclosed, which generally includes a piezoelectric substrate having a surface thereon. One or more interdigital transducers and a passivation layer can be formed upon the piezoelectric substrate. Additionally, an absorbent mater... | 11/14/2006 |
| 7129828 | Encapsulated surface acoustic wave sensor Sensor package systems and methods are disclosed, which include a quartz sensor package encapsulated by an overmold material. A surface acoustic wave sensing element and one or more bonding pads can be integrated with the quartz sensor package. Additionally, one or ... | 10/31/2006 |
| 7100452 | Surface acoustic wave multiple sense element A wireless sensor is disclosed, which includes a substrate upon which the wireless sensor can be configured. The wireless sensor includes a plurality of surface acoustic wave (SAW) sensing elements configured in parallel with one another upon the substrate, wherein ... | 09/05/2006 |
| 7100451 | Surface acoustic wave sensing system and method for measuring pressure and temperature A surface acoustic wave (SAW) sensor and an interrogator that transmits a noise source to the sensor for receiving an interrogation signal that is processed and compared to the source signal provides pressure and temperature measurements. One SAW sensor a single int... | 09/05/2006 |
| 7096736 | Passive tire pressure sensor and method A surface acoustic wave device includes a micro-machined pressure transducer for monitoring tire pressure. The device is configured having a micro-machined cavity that is sealed with a flexible conductive membrane. When an external tire pressure equivalent to the ca... | 08/29/2006 |
| 7086272 | Calibration method for digital air pressure gauge The digital air pressure gauge includes an error correction lookup table database stored within a memory device within the gauge. The database includes reference air pressure values and associated measured air pressure values, where the reference air pressure values... | 08/08/2006 |
| 7070086 | Sensor pre-load and weld fixture apparatus and method A sensor pre-load and welding apparatus and method are disclosed. A weld fixture apparatus includes a fixture base upon which a sensor package having a sensor base and a sensor cover is located, and a load bar associated with a spring, wherein the load bar provides ... | 07/04/2006 |
| 7059511 | Adjustable force and position pre-load welding fixture A pre-load weld fixture apparatus and method are disclosed, which include a stationary pivot block attached to a base, wherein the stationary pivot block is located adjacent to a nest for maintaining an object to be welded. Additionally a pivot arm is associated wit... | 06/13/2006 |
| 7059196 | Disposable wireless pressure sensor In general, a dielectric polymer substrate provided and an antenna formed upon the dielectric polymer substrate. A piezoelectric polymer layer (e.g., a polyvinylidene fluoride (PVDF) piezoelectric film) can be formed above the dielectric polymer substrate. Additiona... | 06/13/2006 |
| 7059195 | Disposable and trimmable wireless pressure sensor for medical applications Disposable pressure sensor methods and systems are disclosed. A substrate can be provided, along with a capacitor and an inductor fixed to the substrate to form a pressure sensor thereof. In a variable L configuration, the inductor can be configured to comprise an i... | 06/13/2006 |
| 7047813 | Sensor slip fit apparatus and method A sensor apparatus and method are disclosed herein. A base is generally located proximate to a cover. A sensor element (e.g., quartz, silicon, ceramic, and the like) can be located on the base, such that the cover and the base form a clearance between the cover and ... | 05/23/2006 |
| 7043129 | Wide bandgap semiconductor waveguide structures A waveguide structure for transmitting broad spectrum light, includes a wide bandgap semiconductor thin film arranged on a substrate and ablated to form a waveguide channel to transmit the broad spectrum light. ... | 05/09/2006 |
