William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7339755 | Ring device with optical focusing mechanism A ring device is adapted for wearing on at least one finger of a user. The ring device includes a wearable main body portion and an optical member that is moveably affixed thereto. The optical member can be positioned in at least two positions: a viewing position, a... | 03/04/2008 |
| 7333248 | Method and apparatus for fastening adjustable optical lenses A paper-separating plate is adapted for a paper-separating mechanism having a paper-separating roller. The paper-separating plate placed around a side of the paper-separating roller comprises a main body and a cushion. The main body has a surface and a plurality of ... | 02/19/2008 |
| 7330213 | Camera for shooting demagnified and magnified images A camera for shooting both a demagnified image and a magnifed image. In an embodiment, the camera includes a housing body containing a CCD, and a lens barrel. An abutted member having an objective lens therein is engaged with the lens barrel and a rotatable manually... | 02/12/2008 |
| 7310187 | Projection objective, especially for microlithography, and method for adjusting a projection objective A method of adjusting a projection objective permits the projection objective to be adjusted between an immersion configuration and a dry configuration with few interventions in the system, and therefore to be used optionally as an immersion objective or as a dry ob... | 12/18/2007 |
| 7304810 | Viewing device and packaging for a viewing device A viewing device includes a housing defining an interior chamber through which light can pass. The housing includes first and second spaced apart openings communicating with the interior chamber such that light entering the first opening is viewed by a user looking ... | 12/04/2007 |
| 7301713 | Object lens unit and optical pickup device employing the unit An object lens unit for an optical pickup comprising: a first optical element positioned facing an optical information recording medium; a second optical element positioned on a light source side of the first optical element; and a frame which has a first reference ... | 11/27/2007 |
| 7277366 | Optical head and optical recording and reproducing apparatus An optical head performs recording and/or reproducing of a signal to an optical recording medium and comprises a light source, an objective lens converging the light emitted from the light source to the optical recording medium, and objective lens tilting mechanism ... | 10/02/2007 |
| 7277239 | Magnification mechanism for viewing an electronic display A magnifier for viewing a display of a device that is external to the magnifier, the magnifier is formed having an optical magnifying lens of a type that is structured for optically magnifying an external view that is optically visible there through, and includes me... | 10/02/2007 |
| 7272101 | Objective lens, optical head and optical information recording/reproducing apparatus A light beam emitted from a light source is focused by an objective lens onto an information recording surface of an optical information recording medium. The objective lens has a substantially truncated-cone-shaped portion on its surface on the side of the optical ... | 09/18/2007 |
| 7209292 | Projection objective, especially for microlithography, and method for adjusting a projection objective A method of adjusting a projection objective permits the projection objective to be adjusted between an immersion configuration and a dry configuration. The projection objective includes optical elements arranged along an optical axis thereof, which include a first ... | 04/24/2007 |
| 7185992 | Lens holding technique A lens apparatus includes a lens unit comprising at least one lens, a holding member disposed at a side surface of the lens unit, a ring-like member disposed between the lens unit and the holding member. In the lens apparatus a fixing agent is surrounded by the lens... | 03/06/2007 |
| 7154401 | Method and apparatus for assessing the integrity of a jewellery setting There is provided a method for assessing the integrity of grip of a stone in a jewellery setting having plural gripping claws to grip said stone, the method comprising heating the stone; measuring conductive transfer of heat from the stone to each of said plural gri... | 12/26/2006 |
| 7142358 | Gem microscope with portability kit A gem microscope according to the invention includes a focus column, a stage, and a quick disconnect mechanism that facilitates removable coupling of the focus column to the stage. The focus column and the stage have compatible features that establish the proper mou... | 11/28/2006 |
| 7055681 | Display structure for gemstones and the like A display structure for an article. The display structure includes a base, a gripping member extending from the base and movable into a position for receipt and clasping of an article, and a platform member positioned above the base and coupled to the gripping membe... | 06/06/2006 |
| 7044295 | Case and case holder A case that makes visible the surface of an object kept therein through one of its sides is provided. The case, which comprises a top (1), a bottom (2) and at least one side (101, 201, 202), is a case for keeping an object therein, and at... | 05/16/2006 |
| 7021489 | Magnifying housing for containers A magnification device for use with a container, particularly a container for medicine, having a housing adapted to receive the container, where the housing is at least partly constructed of a magnifying material, and a structure for inhibiting the rotation of the c... | 04/04/2006 |
| 7000760 | Jewelry box with a viewer A container has a base including a support for an object to be viewed. A container also has a lid on top of the base, the lid having a light-conveying portion for illuminating an object to be viewed and a magnifying viewer for viewing an object to be viewed. ... | 02/21/2006 |
| 6972910 | Lens centering mechanism, lens apparatus and imaging apparatus A lens held by a lens holding member is to be centered easily correctly. To this end, a guide pin 21 is inserted into a guide hole 22 for positioning the lens holding member 3 with respect to the main body unit of the lens barrel 2 in a p... | 12/06/2005 |
| 6940664 | Document imaging system The present invention relates to the use of a camera and a structured light pattern in a platenless document imaging system (1) to capture the image of a page or of a bound book together with depth information that can be inferred from the light pattern. The ... | 09/06/2005 |
| 6909558 | Lens centering mechanism, lens apparatus and imaging apparatus A lens held by a lens holding member is centered easily and correctly by a mechanism in which a guide pin is inserted into a guide hole for positioning the lens holding member with respect to the main body unit of the lens barrel in a plane perpendicular to the opti... | 06/21/2005 |
| 6793886 | Device for monitoring fertility in women by observing physical changes in body fluids A kit (11) is described for the detection of characteristics and parameters of body fluids such as saliva, urine and cervical mucus for the purposes of studying and identifying fertility periods in women, comprising a set of flat plate-shaped supports (3 | 09/21/2004 |
| 6735022 | Viewing and inspection box In general, the present invention provides a viewing and inspection box having a base, a top wall, opposing side walls, and a rear wall defining an interior that is viewed through an open front of the box. An inspection light is held in proximity to the top wall and... | 05/11/2004 |
| 6731438 | Alignment mark system for mass transport processes A technique for creating alignment feature in mass transported substrates yields alignment features that can be located with high degrees of accuracy. Specifically, structures such as concave or convex lenses are created that yield a light pattern in transmission or... | 05/04/2004 |
| 6721109 | Text magnifying device A text magnifying device including a magnifying cavity having an upper surface, a lower surface, and a pair of sides. The upper surface and lower surface are convex. A pair of elevational bars, each have an inner surface, and are attached to and extend longitudinall... | 04/13/2004 |
| 6628459 | Focus stabilizing apparatus A position adjusting means is provided at an outer periphery of an objective lens opposite to an observation sample and the observation sample is moved by the position adjusting means in an optical axis direction of the objective lens to set a focal point... | 09/30/2003 |
| 6623127 | System and method for enlarging a liquid crystal display screen of a personal data assistant The present invention is embodied in a system and method for projecting a liquid crystal display (LCD) of a personal data assistant or mobile telephone. In general, the present invention enables users of PDAs and/or mobile telephones to enlarge the view o... | 09/23/2003 |
| 6614601 | Gimballed optical mount An optical mount for an optical element which has an optical surface. The mount includes a first plate and a second plate which holds the optical element. The second plate may have a spherical bearing surface that cooperates with the first plate so that t... | 09/02/2003 |
| 6549345 | Medicine bottle magnifying lens A magnification device for assisting people to read the small print on medicine vials/bottles. The device including a magnifying lens having the ability to move towards or away from the indicia on the bottle to further aid the user to focus per their part... | 04/15/2003 |
| 6536146 | Movement effect visual display An assembly for displaying pictures, photographs, painting, drawings and similar articles which includes a frame supporting the article so as to be concavely oriented along a central vertical axis toward a front of the frame housing and wherein a compound... | 03/25/2003 |
| 6466381 | Apparatus for positioning an optical component in a beam path An apparatus for positioning an optical component (1) in a beam path (2), preferably in the beam path of a microscope, in particular of a confocal scanning microscope, multiple optical components (1) being arranged in aligned fashion in a mount (3), is ch... | 10/15/2002 |
| 6404565 | Magnifying scope with specimen holders A magnifying scope and accessory holder having a main body having an upper end of reduced dimension for supporting a viewing aperture including an eye cup and window arrangement and a lower portion that includes an open-ended bore occupied by a focus tube... | 06/11/2002 |
| 6381016 | Lead width inspection system and methods A leadframe inspection system, methods, and templates are provided. The leadframe inspection templates include upper and lower specification limits marks that form lead width guides. A user places a leadframe on the template, lines up the leads on the lea... | 04/30/2002 |
| 6373643 | Name card image obtaining device A name card image obtaining device mainly comprises a hollow housing, an image obtaining device and a name card holding device. The hollow housing has a first end and a second end. Several homogeneous light generating sections are disposed near the first ... | 04/16/2002 |
| 6081392 | Medicine container magnifier A magnification device for removable attachment to an object to magnify the surface of the object for improved viewing includes a magnification member of substantially uniform thickness and an attachment part including a front part connected to the magnif... | 06/27/2000 |
| 6055111 | Plastic lens and method of making a plastic lens A plastic lens which is easy to mold and has favorable optical precision. This plastic lens has a flange at the outer periphery of an optically functioning portion, a part of the peripheral surface of the flange being provided with a gate-positioning proj... | 04/25/2000 |
| 6023377 | Golf card protective visual aid An aid for reading indicia, such as that printed on golf scorecards and protecting the scorecard from inclement weather. The apparatus includes a base panel, and a back panel connected together near a first back panel edge. A magnifying lens is mounted to... | 02/08/2000 |
| 5999340 | Magnifier stand A stand for use with a magnifying device having a base plate, a supporting member and a magnifier holder. The stand may hold the magnifier at two different angles to the viewing surface as well as fold into a flat, compact package. The magnifier may be a ... | 12/07/1999 |
| 5969884 | Place keeper for line magnifier A place keeper, for use with a straight edge for designating a row on a cross-stitch pattern, is slidable along the straight edge so the straight edge designates a row, and the place keeper designates a column. Two or more place keepers can be used to des... | 10/19/1999 |
| 5894346 | Biological testing microscope A portable testing device for examining biological samples in one embodiment comprises a support and a tubular member having a lens holder adjacent one end thereof rotatably mounted on the support. A light source is moveable axially within the tubular mem... | 04/13/1999 |
| 5844714 | Portable microscope A portable microscope includes a handgrip-mounted magnifying system and a base to which the handgrip may be removably mounted. An articulating arm is mounted to the base and supports interchangeable specimen holders. Focus of the microscope is accomplishe... | 12/01/1998 |