"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7401571 | Gutter system indicator for indicating a clogged or partially clogged condition A gutter system includes an indicator for indicating that the gutter system is clogged or partially clogged. The indicator includes a floating device such as a ball. There is provided a retainer that retains the ball within the gutter system and in the vicinity of a... | 07/22/2008 |
| 7401508 | Illuminated rain gauge An illuminated rain gauge comprising an elongated, transparent collection vessel or tube having upper and lower ends with the lower end thereof being closed by a plug and which has a funnel-shaped collector at the upper end thereof. The plug has a battery compartmen... | 07/22/2008 |
| 7374323 | Self-illumination applique system and method The various embodiments of the present invention generally include a display device having a surface with indicia formed thereon. The indicia are indicative of at least one vehicle parameter. The display device includes a light guide connected to the surface and a l... | 05/20/2008 |
| 7360545 | Dishwasher A dishwasher having an improved valve assembly is disclosed. The dishwasher includes a housing, a tub provided in the housing, an injector assembly for injecting water onto tableware positioned in the tub, and an inlet valve assembly. The inlet valve assembly includ... | 04/22/2008 |
| 7334536 | Pop-up sewer backup indicator An improved sewer backup indicator. The sewer backup indicator is installed into a sewer cleanout cap housing which comprises a pop-up device that detects and holds the detection of a back up in the sewer system, which is due to number of reasons. This invention hel... | 02/26/2008 |
| 7111636 | Leak container for fuel dispenser A leak collection chamber is provided inside the housing of a fuel dispenser. The leak collection chamber collects any leaked fuel from fuel handling components inside the fuel dispenser so that the fuel does not leak to the environment. The leak collection chamber ... | 09/26/2006 |
| 7104278 | Leak container for fuel dispenser A leak collection chamber is provided inside the housing of a fuel dispenser. The leak collection chamber collects any leaked fuel from fuel handling components inside the fuel dispenser so that the fuel does not leak to the environment. The leak collection chamber ... | 09/12/2006 |
| 7097353 | Method and device for indicating temperature Disclosed is a temperature indicating method and device. The device embodies a sealed tube containing a liquid and a float. The tube has markings on the exterior indicating temperature zones or, in the alternative, temperature gradients. The method disclosed include... | 08/29/2006 |
| 7077003 | Liquid level sensor switch A liquid level sensor-switch capable of effectively reducing variations in levels detected depending on directions in which it is inclined. The sensor-switch has a case, a guide rod formed therein, a float mounted on the guide rod with a clearance and being movable ... | 07/18/2006 |
| 7066024 | Float adapted to track an interface between two liquids of differing density A float adapted to track an interface between two liquids of differing density, includes a hollow buoyant body having an interior cavity adapted to retain liquid. At least one upper access opening is provided in the body, which is adapted to permit filling of the in... | 06/27/2006 |
| 7062957 | Percolation test apparatus A percolation test apparatus comprises a water tank (12), a pipe (36) for directing water from the tank into a hole (20) in the ground, an on-off valve (32) for controlling the flow of water in the conduit, and a water level sensor (30... | 06/20/2006 |
| 7044077 | Mechanical warning device The mechanical signaling device is used for indicating when contaminates are present in water in a manhole so that the contaminated can be cleaned out of the manhole before the contaminates are released into the environment. The mechanical signaling device has a fla... | 05/16/2006 |
| 7037031 | Automatic barricade for low water crossings An automatic barricade includes a trench across a road that is covered by a grate allowing vehicular traffic during normal dry weather. Inside the trench is a series of barricade elements, each of which includes a float. When rising water fills the trench to a prede... | 05/02/2006 |
| 6955169 | Inhaler device A device used with fluid canisters comprising a transparent body allowing the viewing of movement within the body having a minor and major cavity with a float indicator and float seat within the minor cavity. An inhaler top and bottom fits each end of the body formi... | 10/18/2005 |
| 6881327 | Water treatment device with fill-counting cartridge A filter cartridge end-of-life mechanism and a filter cartridge assembly for a water treatment device. The end-of-life mechanism comprises a float which is moved along an escapement path each time the device is filled. A counting mechanism connected to the float pro... | 04/19/2005 |
| 6766688 | Tank volatile liquid level or volume gauge A tank liquid level or volume gauge for use with volatile materials, such as propane, stored under pressure as liquid and released as gas, includes a float with a float magnet that couples with a liquid level indicator magnet across a fluid impermeable wall to provi... | 07/27/2004 |
| 6763780 | Fill level indicator for agricultural material bin A fill level indicator assembly for an agricultural material bin such as a seed dispensing hopper. The assembly includes an elongate sighting member which provides a water impermeable cover over an indicator opening in the bin cover and has a transparent portion pro... | 07/20/2004 |
| 6748805 | Multiple input level sensor A liquid level measuring apparatus is provided, which includes an input circuit configured to receive electrical signals from level sensors configured to provide an electrical signal proportional to a liquid level in a tank portion. The input circuit provides a sing... | 06/15/2004 |
| 6443091 | Drain alert device A drain alert device for detecting an overflow condition in a drainage system having a drain conduit, wherein wastewater is received through an inlet of the drain conduit, is provided, comprising an overflow conduit extending horizontally from the drain c... | 09/03/2002 |
| 6305220 | Fuel gauging system for a motor vehicle fuel tank A fuel gauging system for a motor vehicle fuel tank, including a housing (100) supporting a resistive element (200), an arm (300) pivotally mounted on the housing (100) and comprising at least one cursor (350) engaging the resistive element (200), and a l... | 10/23/2001 |
| 6287456 | Filtration system with filtrate volume indicator A fluid filtration system includes a mechanism for monitoring and indicating the volume of fluid that has passed through a filter 30. The mechanism includes a channel 42 in communication with a reservoir 22, a portion of which is visible exteriorly of the... | 09/11/2001 |
| 6273021 | Oil spill prevention apparatus An oil spill prevention apparatus for use with for a domestic oil storage tank has a catchment tray e located underneath an oil storage tank and extending over the entire footprint thereof. The catchment tray has a depression for pooling oil caught by the... | 08/14/2001 |
| 6205946 | Earthen material integrity sensing device A sensing device and sensing process is described for indicating movement of earthen material adjacent a structure. The preferred device includes a tubular frame including a top end and a bottom end. An anchor is configured to suspend the frame from the s... | 03/27/2001 |
| 6199503 | Boat trailer guide A guide device for attachment adjacent the rear of a boat trailer to assist the driver of a towing vehicle in backing the unloaded trailer into the water. The guide device includes a mounting bracket for attaching the device onto a rear part of the boat, ... | 03/13/2001 |
| 6195013 | Fluid level sensor A float sensor that is modular has a mounting bracket which incorporates an O-ring seal and bayonet style resilient mounting fingers which lock the mounting bracket to a tank flange. A tube is ultrasonically welded to the mounting bracket and positions a ... | 02/27/2001 |
| 5945913 | Liquid level alarm system A liquid level alarm system is activated when liquid in a container falls below a predetermined level. The system contains an alarm located outside the container. The alarm is electrically connected to a switching device. The switching device may have a p... | 08/31/1999 |
| 5862775 | Sewer backup indicator The present invention is a sewer back-up indicator that is positioned within the hole in the cover of the manhole. The indicator includes a bushing and a rod having a valve at one end and an inflatable balloon at the other. The valve is adapted to receive... | 01/26/1999 |
| 5657665 | Tank filling level indicator, especially for a device for countryside, garden, lawn or yard care A fill level indicator (7) for a tank (6) of an internal combustion engine (5) has a housing (8) with an inner chamber (9) connected to the tank (6) to allow the fill level indicator (7) to be visible. The housing (8) includes an upwardly directed housing... | 08/19/1997 |
| 5501255 | Fuel recovery system A fuel recovery system warns a user of an impending overflow of fuel and also provides an overflow chamber into which relatively small amount of overfilled fuel are captured, thus preventing fuel spillage into the surrounding environment. The system is ad... | 03/26/1996 |
| 5485866 | Fluid shut off valve and fill level indication A valve to monitor the level of fluid in an above ground storage tank while the tank is being filled, cutoff the flow of fluid when the tank is in a full condition, and as long as the filling pressure is on the valve the valve will remain cutoff even if t... | 01/23/1996 |
| 5447248 | Indicator for liquid container The instant invention provides a liquid container that may be configured as an insulated container or vacuum flask. The liquid container may indicate the temperature and remaining amount of liquid within the container. The liquid container may include a h... | 09/05/1995 |
| 5427137 | Fluid shut off valve and fill level indication A valve to monitor the level of fluid in an above ground storage tank while the tank is being filled, cutoff the flow of fluid when the tank is in a full condition, and as long as the filling pressure is on the valve the valve will remain cutoff even if t... | 06/27/1995 |
| 5413248 | Maple syrup dispenser A bottle for storing and dispensing maple syrup and like fluids comprising, in combination a one piece container having a generally circular horizontal bottom wall and upstanding side walls of an uneven contour horizontally, vertically, axially and circum... | 05/09/1995 |
| 5285830 | Motorcycle fuel tank extension adapter An adapter tube is arranged for mounting to a motorcycle tank to accommodate the elongate nozzle portion of a gasoline fill valve. The apparatus includes locking structure arranged to secure the gas tank adapter into the associated gas tank.... | 02/15/1994 |
| 5279252 | Fuel tank level indicator A fuel tank level indicator for indicating at a surface when a fuel tank is filled with fuel, such indicator installed on a fuel inlet pipe and having a loop pipe in line with the inlet pipe with a riser pipe at the top of the loop and a float member disp... | 01/18/1994 |
| 5269184 | Device for measuring and controlling ground water levels and method of manufacturing such device A device for measuring and/or controlling ground water levels and a method of manufacturing such device. An embodiment of the device comprises a first tubular member having a top and bottom end and a plurality of perforations for allowing liquid, such as ... | 12/14/1993 |
| 5239285 | Low salt level sensor A low salt level sensor comprising a float within a brine tank, apparatus for detecting whether the float has risen in response to the addition of a predetermined amount of water to the brine tank to a height such that an adequate supply of salt is presen... | 08/24/1993 |
| 5148709 | Spiral gauge with integral support tube A gauge (10) is disclosed which provides advantages in accuracy and cost. A head (16) is mounted on a reservoir containing a fluid to be monitored. A cylindrical support tube (28) is secured to the head and extends into the fluid. A head bushing (40) and ... | 09/22/1992 |
| 5144836 | Liquid level sensing gauge assembly and method of installation A liquid level gauge assembly which has particular utility for petroleum products has a threaded cylindrical projection which allows quick installation onto a storage tank. The gauge assembly operates by measuring the displacement of a float member throug... | 09/08/1992 |
| 5138977 | Unusable milk collection bucket with overflow prevention means A strip bucket utilizable in a cow milking operation is provided with a lid having a ball check valve to prevent bad milk from entering a bulk storage container. Additionally, the ball check valve may be provided with integrally attached milk collection t... | 08/18/1992 |