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| Number | Title | Issue Date |
| 7368852 | Electrically conductive matching layers and methods Matching layers are provided, including: electrically conductive acoustic matching layers, methods for conducting electric current through matching layers, methods for manufacturing multi-dimensional arrays using conductive matching layers, and multi-dimensional arr... | 05/06/2008 |
| 7334733 | Data access device using rotational head to access data stored in data strips and data arc segments or data circles This invention discloses a data card that has a plurality of data arcs and also a linear data track, e.g., a magnetic or optical data strip, disposed on a flat data storage medium. The data card may be employed as a credit card or ID card with conventional magnetic ... | 02/26/2008 |
| 7300695 | Alignable diffractive pigment flakes Diffractive pigment flakes are selectively aligned to form an image. In one embodiment, flakes having a magnetic layer are shaped to facilitate alignment in a magnetic field. In another embodiment, the flakes include a magnetically discontinuous layer. In a particul... | 11/27/2007 |
| 7258915 | Flake for covert security applications Covert flakes having one or more symbols and/or a selected shape are used in a composition, such as ink or paint, to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the covert flakes are covert pigment f... | 08/21/2007 |
| 7241489 | Opaque flake for covert security applications Opaque flakes, such as pigment or bright flake used in paints and inks, have a selected shape and/or other indicia to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the opaque covert flakes match the vi... | 07/10/2007 |
| 7230753 | Method for forming domain-inverted structure and optical element with domain-inverted structure A method for forming a domain-inverted structure includes the following: using a ferroelectric substrate (1) having a principal surface substantially perpendicular to the Z axis of crystals; providing a first electrode (3) on the principal surface of t... | 06/12/2007 |
| 7157195 | Recording material and image forming method An image forming method is disclosed, comprising (a) exposing a recording material comprising on a support an image forming layer containing colored magnetophoretic particles and a photopolymerizable composition to light to perform photocuring and (b) applying a mag... | 01/02/2007 |
| 7109968 | Non-spherical cavity electrophoretic displays and methods and materials for making the same Disclosed herein are novel electrophoretic displays and materials useful in fabricating such displays. In particular, novel encapsulated displays are disclosed. Particles encapsulated therein are dispersed within a suspending, or electrophoretic, fluid. This fluid m... | 09/19/2006 |
| 7047883 | Method and apparatus for orienting magnetic flakes Apparatus and related methods align magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank not... | 05/23/2006 |
| 6999257 | Magnetic disk drive with structure for avoiding DC magnetic disturbance on a disk surface A disk drive of a perpendicular magnetic recording type uses a double-layered disk. The disk has a plurality of tracks for storing data and a non-recording region (GB area) between tracks. Not a DC magnetized pattern but an AC magnetized pattern or a random magnetiz... | 02/14/2006 |
| 6025856 | Magnetic indication sheet printing method and magnetic indication sheet printing apparatus A magnetic indication sheet printing method and a magnetic indication sheet printing apparatus for printing characters and such on a magnetic indication sheet being capable of carrying out an optimum printing process without being affected by the ambient ... | 02/15/2000 |
| 5774157 | Method of density adjustment for a magnetic printing apparatus The dimensions of a magnetized pattern formed on a recording medium are varied, thereby causing the amount of toner attracted to the recording medium to vary, and thereby adjusting the printing density. This type of variation of the dimensions of the magn... | 06/30/1998 |
| 5668578 | Method for fabricating ferrolelectric domain reversals, and optical wavelength converter element A ferroelectric substance such as LiNbO3 that possesses a unipolarized non-linear optical effect is etched on its surface. An earth electrode is formed on one surface (the +z plane) of a ferroelectric substance. Domain reversals are created on ... | 09/16/1997 |
| 5317340 | Method and device for erasing and writing on magnetic recording media suitable for direct viewing Method and devices for erasing and writing on magnetic particle oriented media are described. Erasure is caused by moving a magnetic field which enters and exits the media at a finite angle but stays parallel to the media in some region. A magnetic stenci... | 05/31/1994 |
| 5289202 | Magnetic recording apparatus and magnetic recording medium with a film to be vertically magnetized sandwitched with soft magnetic films A magnetic recording medium having a triple layered structure including a substrate, a first layer or a soft magnetic thin film of high permeability piled on the substrate, a second layer or a vertical magnetization film piled on the first layer, a third ... | 02/22/1994 |
| 5034754 | Magnetic pattern viewer This invention provides a device for visually displaying magnetic patterns assumed within or recorded on a planar medium, e.g. electrical steel sheet, comprising a transparent plate and a membrane secured to and spanning the plate defining a sealed area t... | 07/23/1991 |
| 4996538 | Apparatus for separating and recovering solid developer particles transported by a gaseous flow The invention relates to an apparatus for separating and recovering solid particles transported by a gaseous flow. The apparatus includes a separation chamber (40), an admission conduit (43) by which the gaseous flow laden with particles arrives, an escap... | 02/26/1991 |
| 4646107 | XY plotter apparatus An XY plotter apparatus includes a magnetic panel, a writing tool for applying a magnetic field, a writing tool drive and an erasing magnetic field generator. The writing tool consists of an electromagnet which is arranged so that specified characters and... | 02/24/1987 |
| 4621269 | Magnetic recording arrangement for thermographic printing apparatus Magnetic recording arrangement, for example, in a thermomagnetographic plain-paper printer, produces a latent magnetic image on a magnetic recording medium which is composed of a ferromagnetic layer, first magnetized along a predetermined direction before... | 11/04/1986 |
| 4366488 | Read/write arrangement for a magnetic terminal A terminal has a reciprocating print head bearing a series of linearly arranged, individually-magnetizable styli for printing on magnetic particle oriented paper. The terminal may be used as a printer, or as a display by combining the printer with an eras... | 12/28/1982 |
| 4329694 | AC Corona to remove background from the transfer member of a thermomagnetic copier A process for reproducing graphic information wherein a magnetic image is formed in a premagnetized layer of acicular chromium dioxide by heating the chromium dioxide selectively to above its Curie point. Ferromagnetic toner particles are then applied uni... | 05/11/1982 |
| 4323933 | Device for erasing a record carrier recorded by magnetic fields in visually readable form The record carrier allows visually readable recordings of measured values. A measuring device associated with said record carrier is driven by a drive device. The erasing device comprises at least one erasing magnet positioned directly on top of the recor... | 04/06/1982 |
| 4246588 | Particle feed arrangement for applying solid particles to the image carrier of a non-impact printer A particle feed arrangement for applying solid particles contained in a particle storage tank to an image carrier of a non-impact printer. The arrangement includes a conveying member disposed to pass within a particle supply source to feed the particles t... | 01/20/1981 |
| 4233382 | Electrostatic transfer of magnetically held toner images A process for reproducing graphic information wherein a magnetic image is formed in a premagnetized layer of acicular chromium dioxide by heating the chromium dioxide selectively to above its Curie point. Uncharged ferromagnetic toner particles are then a... | 11/11/1980 |
| 4197563 | Method and device for orientating and fixing in a determined direction magnetic particles contained in a polymerizable ink The invention comes within the field of magnetic recording. A method of ontating and fixing in a determined direction magnetic particles contained in a polymerizable ink (2) spread on a support (1), characterized by the following operations; the support ... | 04/08/1980 |
| 4180207 | Security material and secure document system using said material A secure document is produced by securely attaching to a support a body of including a security feature and having a shape which conveys information to the eye. For example the body is a layer of magnetizable material having apertures of letters, numbers ... | 12/25/1979 |
| 4158862 | Selective fixation method for producing permanent magnetic recordings Permanent magnetic recordings are made by orienting the magnetic particles f a polymerizable ink in a first direction, then selectively polymerizing the ink to fix some of the particles in the first direction. The remaining particles are then oriented in a... | 06/19/1979 |
| 4125844 | Magnetic position marker for a tape recorder using magnetically alignable particles for making the mark A cassette tape recorder including a device for making index marks on a strip denoting the position of magnetic tape relative to a magnetic head, the marking strip being on a cassette exterior surface and having magnetically alignable particles by which v... | 11/14/1978 |
| 4101905 | Method for writing and viewing magnetic human readable characters and viewing means therefor A multi-track magnetic recording head is used to record data in human readable form on a magnetic track on a record medium. A viewer, having a viewing window containing microencapsulated ferromagnetic particles, is used to read the data. When the viewing ... | 07/18/1978 |
| 4074240 | Magnetoelastic storage device Information storage is achieved in powdered magnetoelastic materials. Such powdered magnetoelastic materials have the capability of achieving long storage times of information and also allow information to be stored at relatively high temperatures.... | 02/14/1978 |
| 4054922 | Apparatus for forming an erasable record of the value of a measured quantity The record carrier is made of a material which can be caused to assume a dark state by passing a magnetic field through the record carrier normal thereto. It can be caused to assume a light state by establishing in the general plane of the record carrier ... | 10/18/1977 |
| 4032980 | Recorded magnetic member viewing apparatus Apparatus for viewing latent magnetic images on recorded magnetizable recording members. The apparatus comprises means for advancing a magnetizable recording member bearing a latent magnetic image into a detection station at which a magneto-optic cell pro... | 06/28/1977 |
| 4023204 | Magnetic recording Magnetic record media including permanent structures of aligned acicular particles have been proposed as a means of identifying and authenticating a medium. A method of recording and reading out information on such media without interference from the perm... | 05/10/1977 |
| 3998160 | Magnetic ink printing method A method of printing wherein magnetic particles dispersed in an ink are selectively orientated prior to printing onto a document where the particles are aligned on a carrier while the ink is in a low viscous state and the printing is effected when the ink... | 12/21/1976 |
| 3988738 | Display device utilizing magnetic storage An electromagnetic transducer in the form of a single wire shaped as a one-turn helix records a signal pattern on a web of magnetic material. The portion of the web including the recorded signal pattern thereafter passes opposite a magnetic fluid layer to... | 10/26/1976 |
| 3982334 | Compartmentalized micromagnet display device A device adapted to provide a visual display under the influence of an exterior magnetic field which comprises a plurality of rotatable, multi-colored, non-magnetically interactive, permanently magnetized micromagnets disposed in a cavity within a body ha... | 09/28/1976 |
| 3972715 | Particle orientation imaging system An imaging system wherein an imaging member comprising a layer of softenable substantially electrically insulating material containing a dispersion of randomly oriented electrically photosensitive orientation particles is imaged by: (A) applying a uniform... | 08/03/1976 |
| 3947879 | Multi-color recording medium responsive to force fields and apparatus for recording on the medium A multi-color recording medium responsive to a magnetic or an electrostatic recording field for recording an input signal thereon and having a continuous web of a transparent encapsulating material containing a suspension of highly reflective flakes with ... | 03/30/1976 |
| 3938263 | Compartmentalized micromagnet display device A device adapted to provide a visual display under the influence of an exterior magnetic field which comprises a plurality of rotatable, multi-colored, non-magnetically interactive, permanently magnetized micromagnets disposed in a cavity within a body ha... | 02/17/1976 |
