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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7946045 | Level tool A level tool has a body including a vial opening, a vial positioned at least partially within the vial opening, a passageway formed in the body such that the passageway intersects the vial opening and is axially aligned with the vial, and a plug positioned within th... | 05/24/2011 |
| 7827699 | Environmentally-friendly levels The present invention is directed to environmentally friendly levels. Through the use of renewable resource or environmentally friendly liquids in the transparent tubes of a level, it is possible to provide a level that will not harm the environment if the liquid es... | 11/09/2010 |
| 7779545 | Spirit level The invention concerns a spirit level (10) including a base body (11), e.g., in the form of a hollow profile, as well as a bubble level vial (12), formed of a vial body (14) with enclosed cavity (16), preferably of barrel shape, th... | 08/24/2010 |
| 7765706 | Level A level has a level body made of a hollow profiled section having a bottom wall whose underside forms a measuring surface and further having a top wall and sidewalls, the sidewalls connecting the bottom wall and the top wall. The level body has a window opening for ... | 08/03/2010 |
| 7536798 | Multiple angle compact spirit level The level with a generally u-shaped or round, rigid frame. The outer surface is comprised of a number of planar reference faces that are at different fixed angles to a spirit vial mounted in the frame. Optionally, magnets are embedded in the reference faces. Optiona... | 05/26/2009 |
| 7472486 | Level with vial and manufacturing method therefor A level with a level indicating vial is disclosed. The level includes a frame that defines at least one substantially flat exterior surface configured to be placed against a reference surface. The frame defines a plurality of interior surfaces. The level also includ... | 01/06/2009 |
| 7472487 | Level A level for measuring, including a level body having a recess, a vial positioned within the recess and secured to the level body, and a resilient member positioned between the vial and the level body to act as a resilient backer to the vial during the positioning of... | 01/06/2009 |
| 7467475 | Leveling device A leveling device permitting adjustment to level of a table saw planar surface by a first bubble level and thereafter adjustment of the leveling device to a desired cutting angle, followed by setting the table saw blade to the point where a second perpendicular bubb... | 12/23/2008 |
| 7464479 | Level vial and manufacturing method therefor A method for manufacturing a vial for a level includes forming a blank body from molten material. The blank body includes an exterior surface and an internal bore. The exterior surface has an upper portion generally defining a portion of a cylinder, and a lower port... | 12/16/2008 |
| 7398600 | Level with magnetic device A level with magnetic device relates to a measuring instrument. That level includes a case body and a bubble cell on the case body, and it is characterized in that the cross section of the bottom of the case body, being the location of the reference plane, has a pro... | 07/15/2008 |
| 7370429 | Integrated electronic level device A device adapted to be integrated with a wall hanging for indicating an off-level condition is provided. The device includes a series electrical circuit including a power supply and a signal element connected with the power supply, wherein the signal element is capa... | 05/13/2008 |
| 7363719 | Pocket level A pocket level having a detachable line level whose bubble vial doubles as the pocket level's horizontal bubble vial, and an angle finder for enabling the determination of the angle of an inclined surface which includes a bubble vial housed in a wheel rim directly r... | 04/29/2008 |
| 7360317 | Level having an adjustable mechanism for truing to acquire an exact reading A level having an adjustable mechanism for truing to acquire an exact reading which comprises an elongated rigid body being an I-shaped frame having a web with a first flange transversely extending across a first long end of the web and a second flange transversely ... | 04/22/2008 |
| 7360316 | Level The level of the invention consists of a solid, thin central web that is connected to an upper box and a lower box. The central web supports level vials. The upper box and lower box have a hollow generally polygonal shape and define an upper surface and lower surfac... | 04/22/2008 |
| 7340841 | Slope level A slope level for measuring the slope of a surface is provided. The slope level includes a body having a front face and a back face and defining a first planar measurement surface. A transparent arced tube is disposed on the body. The arced tube has a first end and ... | 03/11/2008 |
| 7322118 | Non-contact electronic level A non-contact electronic level has a light source, a vial having a bubble and positioned to be irradiated by light from the light source, and a photo sensor located at a position corresponding to the bubble at a fixed distance from the vial. The photo sensor capture... | 01/29/2008 |
| 7316074 | Level A level having a body with first and second operative walls interconnected by a web. The first wall having a first exterior operative surface and the second wall having a second exterior operative surface. The first surface and the second surface facing in opposite ... | 01/08/2008 |
| 7299560 | Multi-purpose tool A multi-purpose tool includes a graduated extension pivotably and lockably connected to a leveling extension. The graduated extension includes graduations for measuring length, angles, pitch, or a combination of these measurements. Angles may also be measured with a... | 11/27/2007 |
| 7293394 | Buckling opposing support for I-joist A support device is provided for the preferred application of buckling opposing support of an I-joist having an erroneously cut hole in its web portion. The support device may have an approximate U-shape with two substantially parallel bridging structures combined b... | 11/13/2007 |
| 7281335 | Carpenter's level A level assembly includes a main level with a base wall, end supports at opposite ends of the base wall and at least one intermediate support extending from the base wall at a location between the end supports. Bubble tubes may be mounted in the end supports and/or ... | 10/16/2007 |
| 7266902 | Method and device for fastening a sensor A method and device for securing a sensor, a stereo camera in motor vehicles in particular, in which accurate alignment of the sensor holding element is achieved during assembly using an adjusting gauge having the dimensions of the sensor and optionally pins which a... | 09/11/2007 |
| 7263778 | High contrast spirit-level vial A spirit-level vial comprising a transparent vessel containing a globule of a first liquid suspended in a medium comprising a second liquid, wherein said transparent vessel is essentially completely filled by said medium, and wherein said globule is capable of movin... | 09/04/2007 |
| 7257903 | Leveling rod with stencil A leveling rod and a method of surveying utilizing the disclosed leveling rod are disclosed. The leveling rod comprises an elongated shaft and at least one tape with measurement graduations affixed longitudinally to the elongated shaft. The leveling rod also compris... | 08/21/2007 |
| 7243435 | Level device and method of calibrating a level vial The level device includes a level body having a pair of orthogonal reference surfaces. A vial carrier on the level body holds the level vial such that it can be calibrated with respect to the reference surfaces by rotation about a pair of orthogonal axes, each of th... | 07/17/2007 |
| 7228637 | Impact-absorbing end caps for levels An impact-absorbing end cap for an instrument such as a level is provided that is secured to an end of the level and has an outer portion and an intermediate portion. The intermediate portion is positioned between the outer portion and the body of the level and is s... | 06/12/2007 |
| 7210243 | Level with adjustable fastener locators A level assembly includes a housing having a level mounted within. The housing includes a first arm and a second arm slidably attached to the housing. The first and second arms are both stored in storage positions. Fastener locators associated with each arm are both... | 05/01/2007 |
| 7204029 | Level A level having a body with first and second operative walls interconnected by a web. The first wall having a first exterior operative surface and the second wall having a second exterior operative surface. The first surface and the second surface facing in opposite ... | 04/17/2007 |
| 7171755 | Picture hanging level A level designed for use in hanging pictures is disclosed. The level is proportioned to be easy and convenient to use in conjunction with a picture frame, having a pair of perpendicular legs that can rest on a corner of a picture frame and a level vial positioned wi... | 02/06/2007 |
| 7150106 | Method of using a level A water or spirit level is composed of an elongated body, preferably of metal, at least one bubble mounted in the elongated body, and end caps, preferably of plastics material, at the end faces of the elongated body, wherein at least one outer surface of the elongat... | 12/19/2006 |
| 7137209 | Level and protractor A level and protractor tool (100) includes a body (102) with three sections. The first section (106) includes a spring clip (108) mounted on the body. The spring clip is adapted to be attached to an item that is to be bent or otherwise me... | 11/21/2006 |
| 7121010 | Line generating device A line generating device may include a housing having a bottom surface, a top surface, a front surface connecting the top and bottom surfaces, a rear surface connecting the top and bottom surfaces, and a side surface connecting the top and bottom surfaces, a support... | 10/17/2006 |
| 7117608 | Spirit level A spirit level comprising a body having a level face for setting a surface, at least one bubble vial mounted in the body, the bubble vial having a longitudinal axis generally perpendicular to the level face, and an optical transfer element fixed to the body which tr... | 10/10/2006 |
| 7100295 | Measuring device A measuring device includes a square ruler body provided with a plurality of scales, a plurality of marking lines, and a plurality of counting numbers. Each of the counting numbers has a corresponding numeral which is located under the respective the counting number... | 09/05/2006 |
| 7086166 | Spirit level with integrated inclination adjustment mechanism The present spirit level has an elongated body with a longitudinal leveling face and at least one inclination peg retractably mounted in the body. The inclination peg is configured to selectably extend at least partially out from the leveling face by at least one pr... | 08/08/2006 |
| 7086167 | Overmolded vial for use with a level A vial for use in a level and a method of forming such a vial are disclosed. The vial includes a cylinder having an inner surface defining a cavity, and a material molded around the cylinder. The vial preferably includes at least one marker ring positioned between t... | 08/08/2006 |
| 7073270 | Impact-absorbing end caps for levels An impact-absorbing level is disclosed. The level comprises a body including a level face for measuring a surface, a vial mounted in the body at a predetermined angular relationship to the level face, and a first end cap fixed with respect to the first end, the firs... | 07/11/2006 |
| 7047654 | Retainer clips for securing a cylindrical level vial Hand tool (1) including a pair of retainer clips (7A,7B) for securing a cylindrical level vial (6) in a suitable recess (3), and method of assembly therefor. ... | 05/23/2006 |
| 7024781 | Vial illumination feature for a tool such as a level A vial illumination feature for a tool, such as a level, is configured so as to emit light toward a vial when the tool is used in a darkened environment. The vial extends across an opening or a space defined by the tool, and one or more vial retainer members engage ... | 04/11/2006 |
| 6990742 | Wave level A level having a frame with an edge rail and a web extending from the edge rail at right angles. A web opening is provided in the web. A capsule assembly is mounted on the web at the web opening. The capsule assembly has a transparent capsule having a liquid therein... | 01/31/2006 |
| 6981330 | Multi-axis installable and adjustable level The present multi-axis installable and adjustable level is permanently installed to a suitable panel on or in a movable structure, such as a recreational vehicle or the like, or a portable work table or the like. The present level enables a user of the structure to ... | 01/03/2006 |
