Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7314021 | Operation indicator An operation indicator is provided to indicate the open/closed status of device, e.g. a circuit interrupter operable between open and closed operating positions. The operation indicator includes two indicator members having cooperating interleaved or interlaced cons... | 01/01/2008 |
| 7185955 | Visual indicator for pressurized hub A tactile and visual indicator is mounted on the hub cap of an axle of a vehicle. The indicator has a deformable face that protrudes away from the hub cap in response to the presence of pressurized air in the space containing the wheel bearings. The position of the ... | 03/06/2007 |
| 7131550 | Food storage containers A lid for a food storage container includes a lid body with a vacuum sense opening and a vent opening extending through the lid body, a releasable cover disposed over the vent opening, and a pressure-indicating protrusion. The cover impedes air flow into the contain... | 11/07/2006 |
| 7107928 | Selectively deformable container end closure The present invention describes a container end closure which utilizes a material that is adapted to provide a visible indicator when the internal pressure of the contents increase to a predetermined level. In one embodiment, an interruption in a reinforcing bead in... | 09/19/2006 |
| 7009513 | Inherently deployable warning to alarm of an opening into the top of a sub-grade structure A signal to warn of the open condition of a sub-grade vault whose lid may be open or missing. A spring-loaded placard is held down in the vault by a closed lid and raises above the opening by its own stored energy when the lid is open or missing. ... | 03/07/2006 |
| 6877629 | Food storage device Container for storing food products including a base defining a product support surface for supporting the food product and a cover releasably engaging with the base such that when the cover engages with the base, a storage compartment is defined by the cover and th... | 04/12/2005 |
| 6817311 | Pressure indicator A pressure indicator and a corresponding method are disclosed, the pressure indicator comprising a display diaphragm, optionally transparent, and an indicator diaphragm coupled to and in fluid communication with the display diaphragm. In use, pressure is applied to ... | 11/16/2004 |
| 6636155 | Gauge having adjustable activating means A mechanical gauge having a mechanism for setting multiple alarms within tolerance values. When such tolerance values defined by the mechanism are reached, the same mechanism activates an alarm.... | 10/21/2003 |
| 6327902 | Air filter restriction indicator gauge A low cost air filter restriction indicator gauge for use in conjunction with an internal combustion engine can be achieved by both simplifying individual part configuration and reducing overall part count. More specifically, a simplified design can be ac... | 12/11/2001 |
| 6161417 | Restriction indicator for air cleaners A restriction indicator for an air cleaner of an internal combustion engine. A bellows-type diaphragm is biased toward a retracted position by a first end of a compression spring. A calibration wheel threadingly engaging the housing supports a second end ... | 12/19/2000 |
| 5822902 | Device for displaying information on a fuel pump filler gun Display apparatus connected to a filler gun of a fuel dispensing station. A carrying body on a prominent part of the filler gun supports a detachable display surface carrier which in turn supports an inflatable balloon shaped element. The balloon shaped e... | 10/20/1998 |
| 5566846 | Button enhancement coating system A button enhancement coating system wherein mechanically actuated buttons and vacuum actuated buttons of closures may be provided with a coating system which changes color after the closure has been applied to a container and then removed therefrom with t... | 10/22/1996 |
| 5339764 | Device for optically indicating the pressure of a medium A device for optically displaying the pressure of a medium comprises a housing, a piston within the housing which is movable along a longitudinal axis against a restoring force, and an optically transparent element within the housing having a display surf... | 08/23/1994 |
| 5051360 | Method for detecting microorganism activity Gas-generating or absorbing activity of microorganisms is detected by providing a vessel in which the microorganisms are incubated, the vessel having a cap with a membrane indicator therein. The membrane has a deformed region which is inflated to indicate... | 09/24/1991 |
| 4989745 | Container A container capable of being evacuated by a pump which is removably and sealably attached thereto comprises a cover having a removable valve mounted therein and a container body which is adapted to receive the cover. A compressible indication member is po... | 02/05/1991 |
| 4963693 | Purge enclosure for electrical equipment in hazardous location A protective or purge enclosure provides a positive atmosphere around an operating device such as a hand-held computer or calculator contained therein. The protective enclosure has sufficient flexibility, even though providing a positive, sealed atmospher... | 10/16/1990 |
| 4952498 | Method and apparatus for detecting microorganism activity Gas-generating activity of microorganisms is detected by providing a vessel in which the microorganisms are incubated, the vessel having a cap with a membrane indicator therein. The membrane has a deformed region which is inflated to indicate the existenc... | 08/28/1990 |
| 4877143 | Tamper evident indicating means A tamper evident indicating means for a vacuum packed package or bottle comprising an indicia printed seal that is separated from a translucent closure member when the package or bottle is under vacuum so that the indicia is not readable or discernible th... | 10/31/1989 |
| 4829820 | Visual indicator A gauge or indicator (20) for providing a positive on/off visual indication comprises a lens (22) and a transition mount (24) with a resilient diaphragm (32) secured therebetween to define a sealed chamber therein. The chamber is filled with an opaque liq... | 05/16/1989 |
| 4823727 | Pressure indicator A pressure indicator for use in a pneumatic circuit. A rolling diaphragm (14) is mounted within a housing (9,10) and divides the housing into first and second regions (15,16), one sealed from the other. The diaphragm has an outer sleeve section (18) and a... | 04/25/1989 |
| 4821671 | Captive volume device as a safe life monitor A captive volume device containing a small amount of solid propellant and a safe life indicator such as a colorimeter material or a differential pressure sensor. As the propellant deteriorates, it expends a gas which changes the color of the colorimeter m... | 04/18/1989 |
| 4799383 | Visual indicator A gauge or indicator (20) for providing a positive on/off visual indication comprises a lens (22) and a transition mount (24) with a resilient diaphragm (32) secured therebetween to define a sealed chamber therein. The chamber is filled with an opaque liq... | 01/24/1989 |
| 4776331 | Bandage A bandage useful, for instance, in medical applications includes a rupturable sheet or strip having encapsulated fluid (liquid or gas). The sheet or strip is disposed between the body portion to be bandaged and the outer surface of the bandage. The sheet ... | 10/11/1988 |
| 4729337 | Air pressure indicator An air pressure indicator for mounting on an automobile tire valve. An inflatable balloon is used to indicate a desired condition. The balloon is surrounded by a transparent cap. Should the air pressure in the tire fall below a desired level, the balloon ... | 03/08/1988 |
| 4706830 | Vacuum bottle with pressure indicator A vacuum drainage bottle includes a chamber for receiving fluids from a patient and a pressure indicator (9,21) for measuring the pressure in the chamber. Prior to use, the pressure indicator is isolated from the chamber by means of a breakable seal. The ... | 11/17/1987 |
| 4592747 | Fluid flow sensor A flow sensor wherein a body (10) that includes a recessed surface (18) is covered by a flexible cover (12). The portion of flexible cover (12) adjacent recessed surface (18) moves between a contracted position and an expanded position to indicate flow.... | 06/03/1986 |
| 4546793 | Breath switch An improved switching device for indicating the beginning and ending of the breath of a test subject. A flow through housing is provided with an inlet and first and second outlets. A flexible diaphragm is connected in series with the first outlet to serve... | 10/15/1985 |
| 4509551 | Breath switch An improved switching device for indicating the beginning and ending of the breath of a test subject. A flow through housing is provided with an inlet and first and second outlets. A flexible diaphragm is connected in series with the first outlet to serve... | 04/09/1985 |
| 4502491 | Apparatus for determining the pressure between a support dressing and a body portion surrounded by said support dressing An apparatus for determining the pressure between a support dressing and a body portion surrounded by said support dressing comprises a device for sensing the pressure, a device for indicating the pressure sensed and an arrangement transferring the pressu... | 03/05/1985 |
| 4421124 | Pressure detection arrangement A pressure detection arrangement embedded between the skin of a portion of the body and a means used to surround and/or immobilize that particular part of the body, such as a cast. The pressure detection arrangement is a bifurcated capsule having a reserv... | 12/20/1983 |
| 4404924 | Body fluid suction device indicators A medical suction device is disclosed which includes a vacuum indicator flag. This flag is made up of a flexible tube capped with a plug. The rigidity of the walls of the tube is chosen such that the walls collapse when the pressure inside the tube falls ... | 09/20/1983 |
| 4400123 | Nut and thread protector Methods and apparatus are provided for protecting nuts and protruding threads of bolts from corrosion and damage. A cup-shaped cap is provided for sealingly enclosing the exposed threads. A suitable protecting fluid may be introduced through a charging po... | 08/23/1983 |
| 4396386 | Surgical drainage apparatus with suction control and indication A surgical drainage unit is provided for draining fluids from the body of a patient wherein the suction pressure, applied through a suction inlet of the unit to draw fluids into the unit, is controlled and a direct indication of the applied suction pressu... | 08/02/1983 |
| 4366708 | Pressure checker for pneumatic tire A pressure checker for a pneumatic tire having a tire valve, including a cap member defining an open ended chamber therein and adapted for sealing threaded engagement with the tire valve, a pressing member provided in the chamber and adapted to press the ... | 01/04/1983 |
| 4361107 | Overinflation indicator for tracheal tubes A pressure indicating device for use with medical cannulae having balloon type sealing cuffs such as tracheal tubes. The device would be added to a normal pilot balloon to indicate having exceeded a preset pressure by having a long tubular structure that ... | 11/30/1982 |
| 4295566 | Air-evacuated package with vacuum integrity indicator means An evacuated article-containing package assembly with a vacuum integrity indicator comprises an air-impervious package having an access opening and having at least a flexible portion. An article is included inside the package. A member is included inside ... | 10/20/1981 |
| 4292916 | Timer and storage condition indicator A disposable timer and product storage condition indicator in which components of a carrier mixture react physically and/or chemically with one or more receptive layers. The carrier mixture and receptive layers are so comprised as to react during a given ... | 10/06/1981 |
| 4287750 | Device for checking the functioning of gas measuring apparatus A device for checking the functioning of a gas measuring apparatus which includes a tubular connection for the passage of a gas so that it can be directed through a tube mounted in the connection which has means therein such as a chemical for measuring th... | 09/08/1981 |
| 4286603 | Pressure detection arrangement A pressure detection arrangement embedded between the skin of a portion of the body and a means used to surround and/or immobilize that particular part of the body, such as a cast. The pressure detection arrangement is a bifurcated capsule having a reserv... | 09/01/1981 |
| 4266550 | Pressure indicators for inflatable cuff-type catheters Inflatable cuff-type catheters, e.g., endotracheal and tracheotomy tubes, with cuff pressure indicators are provided. One indicator means comprises an expandable chamber with an open-ended spring about the mid-section of the chamber. As the chamber expand... | 05/12/1981 |
