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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Application No. | Application Title | Issue Date |
| 20120068069 | AUTOMATED FRACTION COLLECTION SYSTEM A system for separating a sample and collecting the separated sample. The system includes an ultracentrifuge having a cylindrical rotor. The system includes a gradient delivery assembly for delivering a gradient solution to the ultracentrifuge rotor, and a sample delive... | 03/22/2012 |
| 20120025112 | DEVICE AND METHOD FOR DETECTING LIQUID LEVEL OF MOLTEN SILICON USING LASER REFLECTED FROM CURVED MIRROR The present invention discloses a laser liquid level detection device with linear optical magnification of a curved minor, wherein two openings are disposed at a top of a single crystal furnace symmetrically, a laser device and a CCD detecting device are respectively di... | 02/02/2012 |
| 20110031420 | Optical Sensor System on a Device for the Treatment of Liquids Optical sensor system on a device for the treatment of liquids with at least one device for the projecting of light in the direction of an optical axis onto at least one illumination area in the space, an adjustment device for the adjustment of the relative position of ... | 02/10/2011 |
| 20100229973 | OPTICAL LEVEL DETECTOR FOR A BEVERAGE MACHINE A level detection device for detecting an upper surface of a liquid at a reference level. The device includes a reservoir having a bottom wall and one or more side walls that delimit a cavity for containing the liquid; a light emitter for emitting a light beam towards t... | 09/16/2010 |
| 20100200756 | OPTICAL LIQUID SENSOR The inventive optical sensor consists of an LED semiconductor material and elements (herein after the LED components) surrounded by a transparent encapsulant that allows much of the light produced by the LED components to pass while a certain small percentage of the lig... | 08/12/2010 |
| 20100192699 | System and Method of Non-Invasive Continuous Level Sensing Embodiments of the present invention provide a system and method for detecting the level of a fluid in a surgical cassette by projecting light from a linear light source into a wall of a cassette. Depending on the amount a light reflected or refracted in the cassette (i... | 08/05/2010 |
| 20100167329 | DEVICE FOR DRUG SCREENING The present invention discloses a device and an optical liquid sensor for drug screening, and a method for using these. More particularly a device, an optical liquid sensor, and a method, for repeatable measurements of the effect of a test drug on a biological tissue sa... | 07/01/2010 |
| 20100078581 | FLUID OVERFILL PROBE WITH THERMAL STRESS PREVENTION A fluid overfill probe is resistant to failure caused by physical stresses resulting from thermal expansion of probe components. A fluid level detector is connected to circuit components that are mounted on a circuit board located in a housing of the probe. The circuit ... | 04/01/2010 |
| 20100032593 | SYSTEM AND METHOD OF DETERMINING FLUID LEVELS IN CONTAINERS INCLUDING AN INFRARED DEVICE FOR DETECTING A FIRST VALUE ASSOCIATED WITH AN EMPTY PORTION OF A CONTAINER (AS AMENDED) A system and method of determining fluid levels in containers is disclosed. In a particular embodiment, a first value of infrared energy associated with an empty portion of a container is detected and the container is scanned to detect a second value of infrared energy ... | 02/11/2010 |
| 20100006786 | METHOD AND APPARATUS FOR OPTICAL LEVEL SENSING OF AGITATED FLUID SURFACES A method and apparatus provide for non-contact optical measurement of the level of a fluid stored in a tank or container, the surface of the fluid being possibly agitated. The method processes numerically the digitized signal waveforms generated by a lidar apparatus bas... | 01/14/2010 |
| 20090194714 | Fiber Optic Liquid Level Sensor There is disclosed a fiber optic liquid level sensor apparatus that functions using total internal reflection and an index of refraction. More specifically, there is disclosed a fiber optic liquid level sensor apparatus comprising two fiber optic strands, each having a ... | 08/06/2009 |
| 20090177116 | BODY FLUID SAMPLING DEVICE AND BODY FLUID MEASURING DEVICE USING THE SAME A body fluid sampling device (100) includes: a connecting portion (105) to which a body fluid container is connected; a suctioning portion (117) which suctions a gas in the body fluid container connected to the connecting portion, to introduce a bod... | 07/09/2009 |
| 20090146087 | Optical Semi-Quantitative 100% Filling Check of Pharmaceutical Capsules on Capsule-filling Machines The invention relates to a method for monitoring the filling of a capsule with a medicament, a corresponding filing method and the corresponding devices. According to the monitoring method, after at least part of the capsule is filled with a given filling mass of given ... | 06/11/2009 |
| 20090084995 | APPARATUS AND METHOD FOR THE CONTINUOUS OPTICAL DETERMINATION OF THE FILL LEVEL OF LIQUIDS IN LIQUID TANKS OF VEHICLES OR AIRPLANES The present subject matter relates to the continuous optical determination of the fill level of liquids in a liquid tank of a vehicle or airplane which have a refractive index of at least 1.33 at room temperature and at a wavelength of 589 nm. A device embodiment has an... | 04/02/2009 |
| 20090050827 | LUBRICANT DETERIORATION DETECTING DEVICE AND DETECTING DEVICE INCORPORATED BEARING ASSEMBLY To provide a lubricant deterioration detecting device having a high degree of freedom in arranging within the bearing assembly or the like and capable of stably detecting the status of deterioration of the lubricant without being affected by the thickness of the lubrica... | 02/26/2009 |
| 20080066542 | System and method of non-invasive continuous level sensing Embodiments of the present invention provide a system and method for detecting the level of a fluid in a surgical cassette by projecting light from a linear light source into a wall of a cassette. Depending on the amount a light reflected or refracted in the cassette (i... | 03/20/2008 |
| 20080022767 | ELECTRO-OPTIC LIQUID LEVEL SENSING SYSTEM FOR AIRCRAFT BEVERAGE BREWING The electro-optic liquid level sensing system detects a level of liquid in a container having an upper opening, such as for a server container of a beverage maker for a transport system, such as for aircraft, trains, trucks, buses and the like. A support housing mates w... | 01/31/2008 |
| 20080011970 | NON-CONTACT SENSOR FOR DETECTING MATERIAL LEVEL IN A CONTAINER A detection system for determining material level in a container where the container has an opening and an optical window mounted to the opening. A sensor element is mounted to the container adjacent the window. The sensor element has an optical emitter and an optical r... | 01/17/2008 |
| 20070279643 | BIOFIEDLIC DISPLACEMENT MEASURING SYSTEM FOR AN ANTHROPOMORPHIC TESTING DEVICE A sensing system (22) for a device (34) contains a light absorbing or scattering object (44). An illumination device (50,72) generating and emitting an illumination beam into the object (44). A first light filter (85) has at lea... | 12/06/2007 |
| 20070145309 | High-temperature optical liquid level sensor The invention provides an optical liquid level sensor used to determine the level of a liquid within a vessel. The sensor includes two adjacent elongated optical elements, such as optical fibers, which connect a first end, or “sensing end”, to a second end, or “no... | 06/28/2007 |
| 20060237670 | Systems and methods for fluid level detection Systems and methods for fluid level detection are disclosed. In one embodiment, a sensor assembly includes at least one optical fiber adapted to at least one of transmit and receive an optical signal, and a moveable float member. The float member is adapted to move in a... | 10/26/2006 |
| 20060219962 | System for detecting a container or contents of the container A system for detecting a container or contents of the container. The system includes a diffuser for retaining the container, where the container is configured to hold an active material therein and may include a wick extending therefrom. The system further includes a se... | 10/05/2006 |
| 20060178578 | Vision system to calculate a fluid volume in a container Broadly speaking the present invention is directed to a system for calculating a volume of fluid that is disposed within a container. The system includes (1) an imaging device that captures and stores an image of at least the volume of fluid in the container; (2) a back... | 08/10/2006 |
| 20060151727 | System and method for detecting dropping amount of liquid crystal A system for determining the amount of LC that is dropped on a display panel is presented. The system can adjust the amount of the LC to be dropped based on a real-time feedback on the amount of LC that is currently being dropped. The amount of LC that is being dropped ... | 07/13/2006 |
| 20060123901 | Electro-optic liquid level sensing system for aircraft beverage brewing The electro-optic liquid level sensing system detects a level of liquid in a container having an upper opening, such as for a server container of a beverage maker for a transport system, such as for aircraft, trains, trucks, buses and the like. A support housing mates w... | 06/15/2006 |
| 20050285060 | Liquid level measurement The present application relates to an apparatus and method for measuring liquid levels in small-volume wells. ... | 12/29/2005 |
| 20050274915 | METHOD AND SYSTEM FOR ENCODING FLUID LEVEL A level transmitter can generate a level measurement signal according to the position of a float that follows fluid level in a tank. The transmitter can comprise an optical encoder with a patterned disk that is linked to the float so that fluid level change produces dis... | 12/15/2005 |
| 20050269532 | System and method for indicating liquid level condition An indicator for displaying either low liquid level or satisfactory liquid level conditions within a tank includes a sensor for detecting the liquid level conditions, a photodetector for detecting an ambient dark condition, a pair of indicator lights for indicating eith... | 12/08/2005 |
| 20050236590 | Content detecting apparatus, container and ink-jet printer The invention relates to a content detecting apparatus capable of detecting at one place presence and/or absence of a container loaded and presence and/or absence of a content remaining in the container. A signal from a light-receiving part 102 receiving light pr... | 10/27/2005 |
| 20050236592 | Optical transducer for detecting liquid level and electrical circuit therefor An optical transducer for determining the presence or absence of liquid or the like in a reservoir includes an electrical circuit with a pulse generator and processing electronics to filter out ambient light and compensate for temperature changes. A comparator circuit p... | 10/27/2005 |
| 20050236591 | Optical transducer for detecting liquid level An optical transducer for determining the presence or absence of liquid or the like in a reservoir includes a housing with a hollow interior and an optical probe that extends through the housing. The optical probe has a central axis, a proximal end positioned in the hol... | 10/27/2005 |
| 20050195087 | Air-in-line detector with warning device Air-in-line sensors utilize infra-red emitter and detector pairs to monitor the presence or absence of air in tubing typically containing soda syrup. Wireless warning devices, activated when air is detected in soda tubing, can be paired to a specific sensor or all senso... | 09/08/2005 |
| 20050156124 | Optical device and turbidity detection apparatus using same An optical device is described that include: a photoemitter for emitting light, a mounting unit for installing a transparent container accommodating a sample to be subjected to detection, a photoreceptor for receiving the light emitted by a photoemitter and transmitted ... | 07/21/2005 |
| 20050139793 | Use of wicking means to manage fluids on optical level sensing systems A fluid reservoir sensing system includes a pair of optical prisms or sensor targets that reflect light when a fluid level is below one of the pair of prisms or sensor targets. The pair of optical prisms or sensor targets includes a low prism or sensor target usable to ... | 06/30/2005 |
| 20050128369 | Apparatus and method for the measurement of water depth using a controlled receiver An Laser Airborne Depth Sounder (LADS) system for the measurement of water depth is disclosed, the system includes a transmitter and a receiver of laser light having at least two wavelengths so as to receive a first reflection from a water surface and a second reflectio... | 06/16/2005 |
| 20050094148 | Method for measuring the filling level of a liquid in a cavity having a sub-mm wide opening The invention relates to a method to optically measure the filling level of a liquid in a cavity having a sub-mm wide opening with the aid of a measuring sensor based on chromatic coding, the measuring sensor delivering a distance value and an intensity value as its out... | 05/05/2005 |
