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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 5945189 | Magnetic recording medium including mica substrate In a magnetic recording medium, a substrate is made of mica having a cleavage surface, and a magnetic recording layer is formed on the cleavage surface.... | 08/31/1999 |
| 5939187 | Magneto-optical recording medium A magneto-optical recording medium includes a reproducing layer which has in-plane magnetization at room temperature and has perpendicular magnetization at an elevated temperature of not less than a critical temperature, a recording layer made of a perpen... | 08/17/1999 |
| 5939163 | Optical information recording medium An optical information recording medium which records at shorter laser wavelengths and has excellent light resistance and archival stability includes a supporting substrate and a recording layer coated on the substrate. The recording layer includes a meta... | 08/17/1999 |
| 5935672 | Reversible optical information medium A description is given of an reversible optical information medium comprising a substrate, a first dielectric layer, a phase-change recording layer on the basis of Ge--Sb--Te, a second dielectric layer, and a metal mirror layer. The recording layer compri... | 08/10/1999 |
| 5932690 | Optical recording elements having recording layers exhibiting reduced bubble formation The present invention discloses an optical recording element having, in the following order, a transparent substrate, a recording layer and a light reflecting layer wherein the recording layer (A) has a real refractive index (N) at 780 nm not less than 1.8 and... | 08/03/1999 |
| 5925433 | Optical recording medium based on Fabry-Perot principle The present invention is in the field of optical recording media, and is directed to an optical recording medium which comprises the following layers; a) a grooved transparent substrate (1), superposed by b) a recording layer comprising a partial mirror (2) of... | 07/20/1999 |
| 5922429 | Optical recording elements having recording layers containing mixtures of low k metallized formazan and cyanine dyes An optical recording element is disclosed. The element has a transparent substrate and on the surface of said substrate, a recording layer and a light reflecting layer wherein recording layer comprises a mixture of a metallized formazan dye and cyanine dy... | 07/13/1999 |
| 5923639 | Phase-change optical recording medium having an additive related to the writing line speed An optical recording medium having a phase-changing material layer served as a recording layer is composed to excellently repeat the rewrite of bits independently of the line speed of the writing light. The amount of the additive to be added to the phase-... | 07/13/1999 |
| 5916656 | Sheet glass flattening method, method of manufacturing an information recording glass substrate using flattened glass, method of manufacturing a magnetic disk using glass substrate, and magnetic recording medium A glass substrate manufacturing method advantageously applicable to magnetic recording disk glass substrates, LCD glass substrates, photomasks glass substrates, or optical memory glass substrates. The method includes the steps of forming a film of a solut... | 06/29/1999 |
| 5914167 | Information recording medium with light-emitting area, storage case with light-emitting area for information recording medium, and sheet with light-emitting area for information recording medium An information recording medium, a storage case for storing an information recording medium, or a sheet for use with an information recording medium, has a light-emitting area coated with a phosphorescent paint, and a luminous paint area coated with a lum... | 06/22/1999 |
| 5912103 | Phase change optical recording medium A phase change optical recording medium in which writing, reading and/or erasing of information is conducted by utilizing change of phase of a recording layer by irradiation of a light beam, said recording medium comprising a substrate, a first transparen... | 06/15/1999 |
| 5906874 | Optical recording medium, and its fabrication method The invention provides a phase change type optical recording medium enabling an increased jitter concomitant with repeated overwriting to be restrained or substantially eliminated. In the optical recording medium comprising a phase change type recording l... | 05/25/1999 |
| 5904969 | Optical data recording medium and manufacturing method thereof A desired writable optical data recording medium has a transparent substrate 1 where a side wall of a recess is connected to a land surface by a curved surface. A data recording portion of a dye material may be placed only in recesses of a pre-formatted p... | 05/18/1999 |
| 5895697 | Optical information medium An optical information medium comprises a first disc forming information recording layer on a main surface thereof, a second disc being bonded to the first disc at the surface where the information recording layer is formed by way of an adhesive. A hydrop... | 04/20/1999 |
| 5891542 | Optical recording material, and optical recording medium One object of the invention is to achieve a phase change type optical recording medium having high degree of modulation and recording sensitivity, and another object of the invention is to achieve a phase change type optical recording medium having alread... | 04/06/1999 |
| 5882760 | Recordable optical disks with metallic interlayer A recordable optical disk including a transparent substrate; a recording layer formed over the substrate; a reflective layer formed over the recording layer; and a thin metallic interlayer formed on the recording layer at the interface between the reflect... | 03/16/1999 |
| 5882759 | Information recording medium and information memory storage An information recording medium which comprises as a recording layer an information recording thin layer, formed on a substrate directly or via an underlayer, which records and/or reads back information through the use of atomic arrangement change caused ... | 03/16/1999 |
| 5882757 | Optical information recording medium and method of producing the same An optical information recording medium includes a substrate, and a light absorption layer formed thereon which includes a phthalocyanine compound (I) having a thermal decomposition temperature in a range of 250° C. to 350° C., measured by thermogravime... | 03/16/1999 |
| 5882758 | Optical recording medium A phase-change type optical recording medium, wherein (1) recording, erasing and reading of information by irradiating light is possible, and the medium has a structure in which a first protective layer, a recording layer, a second protective layer, and a... | 03/16/1999 |
| 5879822 | Magneto-optical recording medium using in-plane magnetization film and capable of reproducing at super-high resolution and method of reproducing for such medium A magneto-optical recording medium is constructed by a reproduction layer which assumes an in-plane magnetization state at room temperature and becomes a perpendicular magnetization film at temperatures between room temperature and a Curie temperature, a ... | 03/09/1999 |
| 5879772 | Information recording medium An information recording medium composed of 1) a transparent support, 2) a recording layer which is composed of an organic dye and an organic oxidizing agent having a reduction potential on the side nobler than -0.2, and 3) a light-reflecting layer on the... | 03/09/1999 |
| 5879773 | Recordable optical disks with dielectric interlayer A recordable optical disk including a transparent substrate; a recording layer formed over the substrate; a reflective layer formed over the recording layer; and a thin dielectric interlayer formed on the recording layer at the interface between the refle... | 03/09/1999 |
| 5879774 | Multilayer laminate elements having an adhesive layer Multiple layer laminate element, such as DVD optical recording elements, are disclosed. The laminates include a cured cyanoacrylate adhesive layer in direct contact with a polymeric layer having a chemically bound cure accelerator for the cyanoacrylate.... | 03/09/1999 |
| 5876820 | Optical information recording medium and composition for optical information recording film An optical information recording medium is here disclosed which comprises a transparent substrate, a recording layer comprising an organic dyestuff on which information can be written by a laser beam, a reflective layer and a protective layer formed in th... | 03/02/1999 |
| 5876821 | Tetra dye mixed with another dye or dyes for optical recording elements A dye mixture having, at 780 nm, a real refractive index not less than 1.8, and an imaginary part not greater than 0.15 and comprising (a) a tetra dye having a metallized azo dianionic dye with a cationic dye counterion and (b) at least one other dye havi... | 03/02/1999 |
| 5876823 | Optical information medium, method for producing the optical information medium, and unit for producing the optical information medium The optical information medium of the invention includes: a first substrate having a first information signal layer; a first reflective film formed on the first information signal layer of the first substrate; a second substrate having a second informatio... | 03/02/1999 |
| 5876822 | Reversible optical information medium A description is given of an reversible optical information medium comprising a substrate (1), a first dielectric layer (2), a phase-change recording layer on the basis of Ge-Sb-Te (3), a second dielectric layer (4), and a metal mirror layer (5). The reco... | 03/02/1999 |
| 5876858 | Magneto-optical recording medium with magnetic film having large magnetic anisotropy A magneto-optical recording medium improved in reproduction stability and carrier-to-noise ratio by enlarging the magnetic anisotropy of a magnetic film. The magneto-optical recording medium is composed of a transparent substrate, a first dielectric film ... | 03/02/1999 |
| 5874147 | Column III metal nitride films as phase change media for optical recording This invention provides phase change media for optical storage based on semiconductors of nitrides of the column III metals. The surface of thin films of these wide bandgap semiconductors may be metallized (by desorption of the nitrogen) by irradiating wi... | 02/23/1999 |
| 5871882 | High capacity recording media An optical recording medium comprising a substrate, a reflecting layer and a recording layer, which recording layer consists essentially of one or more than one dye of formula (I) or chlorination or bromation products thereof ##STR1## wherein R | 02/16/1999 |
| 5871881 | Multilayer optical information medium A multilayer optical information medium provided with structure in which first and second substrates respectively provided with two to four layers of planar information areas are respectively arranged outside wherein the thickness of the above-described f... | 02/16/1999 |
| 5869163 | Optically readable thin film digital data storage medium and playback adaptor An optically readable data storage medium includes a thin film data carrier fabricated from first and second juxtaposed plastic layers. A microembossed data surface is positioned within an interface zone and includes physically displaced surface elements ... | 02/09/1999 |
| 5858498 | Information recording medium for manufacturing the medium, and apparatus for manufacturing the medium In an optical disk obtained by pasting two substrates, air bubbles and the like are removed from an adhesive layer between the substrates pasted together, and the thickness irregularity of the adhesive layer is suppressed to an allowable value or less. A ... | 01/12/1999 |
| 5859833 | Optical disk grade copolyestercarbonates derived from hydroxyphenylindanols Copolycarbonates having low intrinsic birefringence comprise structural units derived from hydroxyphenylindanol, from resorcinol, alkylenedioic acid or eugenolsiloxane, and, optionally, from a bisphenol, preferably bisphenol A. The copolycarbonates are us... | 01/12/1999 |
| 5855979 | Optical recording medium An optical recording medium comprising a recording layer, a light interference layer, a reflective layer and a protective layer that are laminated on a substrate, characterized in that said recording layer and said light interference layer comprise at lea... | 01/05/1999 |
| 5851621 | High-capacity storage media The invention relates to an optical recording medium comprising a substrate, a reflecting layer and a recording layer, which recording layer consists essentially of a dye of the formula (I), ##STR1## in which R1 and R6 are hydro... | 12/22/1998 |
| 5851729 | Optical disc An optical disc having, as a recording layer, a first Sb--Se based thin film, a Bi--Te based thin film and a second Sb--Se based thin film, deposited in this order on a disc substrate, and a thin Al film deposited on the recording layer, is disclosed. Eac... | 12/22/1998 |
| 5849458 | Recordable optical device including a barrier layer For an optical recordable disk, a heat conductive gold layer can be deposited on a phase-change recordable layer to increase the writing threshold. This higher threshold improves the data stability during readout. However, it has been found that there is ... | 12/15/1998 |
| 5846625 | Optical recording medium and information processing apparatus used therefor An optical disk apparatus using an optical disk in which a layer (a reflectivity adjustment layer) in which the optical constants are changed by melting at the time of irradiation of light is provided separately from a recording layer using a phase change... | 12/08/1998 |
| 5846627 | Method for writing and reading data on a multi-layer recordable interferometric optical disc and method for fabricating such A recordable compact disc comprises a 0.6 millimeter clear plastic or glass substrate on which is grown a thin-film image layer having several distinct recording planes. Each recording plane is separated from the next by a clear plastic layer. Each record... | 12/08/1998 |
