Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7443774 | Optical head and data processing apparatus including the same An optical data processing apparatus reads and/or writes data from/on a data storage medium, in which first and second data storage layer are stacked, by radiating light from the second layer. The processor includes: a light detector including at least one photodete... | 10/28/2008 |
| 7210155 | Magneto-optical recording medium having in-plane magnetizing layer A high-density magneto-optical recording medium having excellent jitter properties is provided. A pattern-dependent shift of the length of a recorded mark does not occur even when a minute mark has increased sensitivity to a recording magnetic field. A magneto-optic... | 04/24/2007 |
| 7200084 | Apparatus for discriminating optical recording medium and method for discriminating optical recording medium The present invention provides a method and an apparatus for discriminating the type of an optical recording medium and the number of recording layers in the medium. The apparatus includes a first electrode and a second electrode placed in the vicinity of a light tr... | 04/03/2007 |
| 7169454 | Multi-stack optical data storage medium and use of such medium A description is given of a multi-stack optical data storage medium (20) for rewritable recording using a focused radiation beam (30) entering through an entrance face (16) of the medium (20) during recording. The medium (20) has a... | 01/30/2007 |
| 7151734 | Player with two read heads for double-sided optical discs A double-sided optical disc, such as a DVD-18 disc, is formed with data tracks on each layer. The tracks on one side are oriented along one spiral while the tracks on the other side are oriented along a second spiral, the two spirals being oriented in opposite direc... | 12/19/2006 |
| 7123570 | Recording/reproducing apparatus with optical path correction system A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording layers. Alternatively, with respect to at least one light source in a... | 10/17/2006 |
| 7075870 | Recording/reproducing apparatus for optical information recording medium and optical head A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording layers. Alternatively, with respect to at least one light source in a... | 07/11/2006 |
| 6934238 | Optical recording medium having dual information surfaces A reproduction apparatus is provided for reproducing information stored on an optical medium. The apparatus includes a light source for illuminating the optical medium, the optical medium having at least one surface containing information stored thereon; a focusing ... | 08/23/2005 |
| 6934237 | Optical recording medium having dual information surfaces A reproduction apparatus is provided for reproducing information stored on an optical medium. The apparatus includes a light source for illuminating the optical medium, the optical medium having at least one surface containing information stored thereon; a focusing ... | 08/23/2005 |
| 6910174 | Error correction code block format An error correction code (ECC) block for a data storage disk, includes an array of data that is 88 rows by 172 columns. Each row includes ten bytes of inner parity code and each column includes sixteen bytes of outer parity making the array 104 rows by 182 columns. ... | 06/21/2005 |
| 6904002 | Magneto-optical reproducing method using a plurality of different reproducing beams A magneto-optical recording medium has magneto-optical recording layers (11, 12, 13) and reproducing layers (21, 22, 23). The information recorded in the reproducing layers are reproduced by means of reproducing light beams (31, 32, 33) of diffe... | 06/07/2005 |
| 6649285 | Magneto-optical recording medium and manufacturing method therefor A magneto-optical recording medium includes a magnetic reproducing layer having an axis of easy magnetization in a direction perpendicular to its layer surface, a magnetic intermediate layer formed on the magnetic reproducing layer and having an axis of e... | 11/18/2003 |
| 6650978 | Method and apparatus for preserving calibration data in a vehicle seat occupant detection system Dedicated memory locations for vehicle identification data and seat calibration data are provided in a first rewritable, non-volatile memory within an occupant detection system module and a second rewritable, non-volatile memory external to the occupant d... | 11/18/2003 |
| 6172945 | Double-sided magneto-optical recording disk A magneto-optical disc is described. The magneto-optical disc comprises a substrate and a magneto-optical recording layer applied over the substrate. The magneto-optical disc further comprises an overcoat layer applied over the recording layer having a th... | 01/09/2001 |
| 6125084 | Optical disk device using a recording medium structurally arranged to generate a recording clock A high-speed large capacity file system is built in which the track density is improved by applying a highly precise magnetic domain width control technique to a light pulse-irradiated magnetic field modulation magnetooptical disk device which can be over... | 09/26/2000 |
| 6125085 | Optical recording method and device for optimally controlling the width of the recording marks A method and apparatus are provided for optimally controlling the width of recording marks formed by a light beam on an optical recording medium in an optical recording apparatus. The method is accomplished by selecting and storing in a storage device a p... | 09/26/2000 |
| 5966363 | Optical and magneto-optic data storage systems utilizing transmissive media An optical data storage system utilize a fully or partially transmissive data storage medium or disk. The optical system includes a platform capable of moving either radially or pivotally relative to the disk. A head has a first and a second optical arms ... | 10/12/1999 |
| 5910932 | Optical disk and optical disk system with numerical aperture of objective lens related to protective layer thickness of optical disk An optical disc system uses a rewritable optical disc with a light-transmitting cover and an objective lens for bundling or focusing a light beam on a recording layer of the optical disc in order to perform recording and/or reproducing of information. The... | 06/08/1999 |
| 5901118 | Magneto-optical recording medium having a readout layer and a recording layer A magneto-optical recording medium having a substrate whereupon a transparent dielectric layer, a readout layer showing in-plane magnetization at room temperature and perpendicular magnetization with an increase in temperature, a metal film layer, a recor... | 05/04/1999 |
| 5862103 | Magneto-optical recording method capable of determining optimum laser beam intensities A method and apparatus for recording data on a magnetooptical recording medium finds an optimum laser beam intensities for recording. The method and apparatus do not cause a low level PL setting to become excessively low and poor overwriting of... | 01/19/1999 |
| 5838646 | Optical disk having a protective layer of specified thickness relative to the numerical aperture of the objective lens An optical disc system uses an optical disc with a light-transmitting cover and an objective lens for bundling or focusing a light beam on a recording layer of the optical disc in order to perform recording and/or reproducing of information. The thickness... | 11/17/1998 |
| 5784343 | Magneto-optical recording and/or reproducing apparatus having a plurality of optical systems A magneto-optical recording and/or reproducing apparatus having a magnetic head and first and second optical systems for recording on and/or reproducing from first and second magneto-optical media. The first optical system has a first objective lens, and ... | 07/21/1998 |
| 5757736 | Method of and apparatus for recording information to magneto optical disc having plural recording layers The magneto optical disc is provided with at least first and second recording layers such that the record information is recorded to the first recording layer at a vertically magnetized state thereof and is also recorded to the second recording layer at a... | 05/26/1998 |
| 5757733 | Optical disc system having an objective lens with a numerical aperture related to the thickness of the protective layer A magneto-optical disc system includes a magneto-optical disc 40 with a light-transmitting cover layer 41, an objective lens 2 for bundling or focusing a laser beam onto a magnetic recording layer 43 of the magneto-optical disc 40 for recording informatio... | 05/26/1998 |
| 5742581 | Transmissive optical and magneto-optical data storage media An optical data storage medium transmissive to a laser beam and formed of a light transmissive substrate that provides mechanical support, and a light transmissive data substrate formed on the substrate. The data substrate is patterned to form block regio... | 04/21/1998 |
| 5731076 | Recording media A recording media comprises in cross-section, a substrate, a first dielectric layer, a recording section, a second dielectric layer and a reflector layer. The recording section comprises a plurality of thin magneto-optic recording layers interspersed with... | 03/24/1998 |
| 5671206 | Optical pickup device An optical pickup device for recording/reproducing an optical disc having at least two data storing layers on one side thereof generates a first and second laser beams of same polarization (S-polarized beams) from a first and second laser beam sources. Th... | 09/23/1997 |
| 5644555 | Multiple data surface magneto-optical data storage system An optical data storage system comprises an optical disk drive and a multiple data surface magneto-optical medium. The medium comprises a substrate, a first dielectric layer, a first magneto-optical data layer, a second dielectric layer, a transmissive me... | 07/01/1997 |
| 5617378 | Magneto-optical disc system having an objective lens with a numerical aperture related to the thickness of the protective layer An magneto-optical disc system includes an magneto-optical disc with a light-transmitting cover and an objective lens for bundling or focusing a laser beam on a recording layer of the magneto-optical disc in order to perform recording and/or reproduction.... | 04/01/1997 |
| 5610880 | Optical disc system and optical disk therefor An optical disc system using an optical disc with a light-transmitting cover and an objective lens for bundling or focusing a laser beam on a recording layer of the optical disc in order to perform recording and/or reproduction. The thickness t2 | 03/11/1997 |
| 5533001 | Magneto-optical disk system with specified thickness for protective layer relative to the numerical aperture of the objective lens A magneto-optical disc system includes a magneto-optical disc with a light-transmitting cover, an objective lens for bundling or focusing a laser beam on a magnetic recording layer of the magneto-optical disc in order to perform recording and/or reproduct... | 07/02/1996 |
| 5528565 | Magneto-optic recording system A magneto-optic recording system uses a unit recording medium having on a substrate a first magnetic layer whose Curie temperature is low and also having on the first magnetic layer a second magnetic layer whose Curie temperature is high. The system heats... | 06/18/1996 |
| 5515346 | Magneto-optical disk system with specified thickness for protective layer relative to the numerical apperture of the objective lens A is a magneto-optical disc system includes a magneto-optical disc with a light-transmitting cover, an objective lens for bundling or focusing a laser beam on a magnetic recording layer of the magneto-optical disc in order to perform recording and/or repr... | 05/07/1996 |
| 5513170 | Multiple data surface optical data storage system An optical data storage system comprises a multiple data surface medium and optical head. The medium comprises a plurality of substrates separated by a light transmissive medium. Data surfaces are located on the substrate surfaces which lie adjacent a lig... | 04/30/1996 |
| 5487926 | Optical disk An optical disk includes a pair of disk substrates and a recording layer on at least one substrate, the disk substrates being mated by bonding the substrates at their inside surfaces through an adhesive layer such that the recording layer is internally en... | 01/30/1996 |
| 5481508 | Magneto-optic recording medium method of manufacturing the same and magneto-optic recording system A unit recording medium, having on a substrate a first magnetic layer whose Curie temperature is low and also having on the first magnetic layer a second magnetic layer whose Curie temperature is high, is heated by a heating device. After two such unit re... | 01/02/1996 |
| 5420834 | Optical disk recorders using disks coatings close to outer surfaces with optical path extending through a thick transparent substrate A magnetooptical disk has two axially space-apart translucent recording layers. Each translucent recording layer is axially closer to an outer surface of the disk than to the other recording layer. This geometry enables closely axially disposing a magneti... | 05/30/1995 |
| 5392262 | Two-sided optical disks having recording layers disposed close to outer surfaces and spaced axially apart a greater distance and devices for using the disks A magnetooptical disk has two axially space-apart translucent recording layers. Each translucent recording layer is axially closer to an outer surface of the disk than to the other recording layer. This geometry enables closely axially disposing a magneti... | 02/21/1995 |
| 5381390 | Directly overwrite information by using two radiation beams onto a single magneto-optical recording Apparatus is disclosed for the direct overwriting of an optical storage medium having a magneto-optical recording layer. The apparatus includes a condensing lens for focusing radiation from first and second radiation sources on a first and a second region... | 01/10/1995 |
| 5340647 | Optomagnetic recording medium An optomagnetic recording medium comprising a substrate plate and, provided thereon, a recording layer and a reflection layer, said reflection layer consisting of a thin layer of an alloy of aluminum and tantalum.... | 08/23/1994 |
