Matches 1 - 50 out of 88 1 2 >
Match Document Document Title
7263053 Information recording method and information recording apparatus  
An information recording method and information recording apparatus is capable of resolving the trade-off relation between recording density and transmittance, wherein either the reproduction...
7170843 High-density data storage medium, method of manufacturing the data storage medium, data storage apparatus, and methods of writing data on, and reading and erasing data from the data storage medium by using the data storage apparatus  
A high-density data storage medium, a method of manufacturing the data storage medium, a high-density data storage apparatus, and methods of writing data on, and reading and erasing data from the...
7149180 Apparatus for recording information in and/or reproducing information from a ferroelectric recording medium  
A dielectric recording medium in a disc form is provided with: a center hole; an inner area; a recording area; and an outer area, arranged concentrically from the inside in this order. The inner...
7027364 Information storage apparatus using a magnetic medium coated with a wear-resistant thin film  
There is provided an information storage apparatus including recording medium and a head. The recording medium has an electrode layer, a magnetic layer that is stacked on the electrode layer, and a...
6977883 Information recording medium having pair of electrodes  
Disclosed herewith is a method for enabling fast and high density recording of information. A voltage is applied to a recording layer formed between a pair of electrodes. The distance between the...
6577591 Optical recording medium  
Disclosed is an optical recording medium having a charge generating ability capable of generating electric charges with different polarities upon irradiation with light and a charge transporting...
5751689 Information recording medium  
An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity...
5724336 Tera-byte disk drive  
A new form of rotating media disk drive is described. Data storage densities of many gigabits per square inch can be obtained at low cost. Data is stored in localized regions of electric charge...
5598398 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...
5459710 Apparatus for recording information in data sections having number of bytes which increases with increase in circumference of tracks on medium  
An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity...
5388090 Method, apparatus, and medium for recording information in data sections having number of bytes which increases with increase in circumference of tracks on medium  
An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity...
5291472 Information recording and reproduction methods using oscillation medium or transducer  
High density recording systems and methods are disclosed which employ a radiation beam to form spot-like recordings in record members such as discs, tapes and cards. The angle, offset or...
5255263 Information reading system and record carrier and reading device for use in such a system  
The disclosed information reading system comprises a record carrier (1) having at least two parallel tracks (2a, 2b) whose mutual distance is so small that the radiation beam (10) is modulated by...
5210738 Optical information recording medium  
An optical information recording medium, such as an optical disk, includes a meandering guide groove being varied in period according to first additional information and in amplitude according to...
5166006 Textured thin-film substrate and method  
A method of forming an isotropic texture having a selected summit density and surface roughness in a selected inner-diameter annular zone of a thin-film medium substrate having a polished metal...
4907216 Optical record carrier having position indentifying track modulation  
A system for recording and/or reading an information signal (V i ) on an elongated track (4) of an optically readable record carrier (1). A position-identifying signal (V p ) which is synchronous...
4860277 Medium and method for irreversible storage of information  
A medium for irreversible information storage by locally changing the electrical conductivity of a carrier whose discrete areas of electrical conductivity have been produced by means of polymeric...
4827466 Information signal recording medium electrostatic capacitance type  
A recording medium of electrostatic capacitance type is recorded with an information signal thereon as variation of geometrical shape of the recording surface part of the recording medium. The...
4776935 High density record including carbon black particles purified by electrolysis  
A high density information record of the electrostatic capacitance type which comprises a record substrate on which signal information is recorded as geometric variations. The substrate is made of...
4663753 Recording medium and method of making the same  
A method is disclosed for recording information wherein an information-containing surface relief image is mechanically micromachined into a recording medium formed of a copper/oxygen amalgam...
4646284 High density information record medium using carbon black particles surface-treated with silicone oil  
High density information signal recording media of an electrostatic capacitance type, in which an information signal is recorded as geometric variations. The medium consists of a conductive resin...
4631717 High density information records of an electrostatic capacitance type  
High density information records formed from conductive resin compositions which comprise a graft polymer obtained by subjecting vinyl chloride monomer to graft polymerization with a copolymer of...
4604687 Method and system for storing and retrieving multiple channel sampled data  
A method and system for recording and playing back from a bulk digital data storage medium having unequal access time, such as a rotating magnetic disk, data of a plurality of separate files, such...
4592862 Conductive resin composition and information record  
A conductive resin composition comprising a specific type of graft polymer of vinyl chloride and a vinyl chloride/acrylic ester copolymer, and a conductive powder used in an amount of from 10 to 30...
4575834 Method of improving the signal-to-noise ratio in a capacitance electronic disc system  
The audio signal-to-noise ratio obtainable in a capacitance electronic disc system which includes a conductive disc formed from a plastic resin containing conductive particles and a playback stylus...
4561087 Conductive video disc  
A video disc comprises a grooved disc having video information in the form of a surface relief pattern within the groove, the disc made from a plastic material containing finely divided conductive...
4560601 High-density information disc lubricants  
High-density information records are lubricated with a methyl alkyl siloxane lubricant containing an effective amount of a donor-acceptor complex to reduce moisture sensitivity.
4548739 High density information records made of conductive resin compositions comprising a specifically-treated vinyl chloride-base resin  
A high density information record of the electrostatic capacitance type comprising a record substrate on which signal information is recorded as geometric variations. The record substrate is made...
4540615 High-density information disc lubricant  
Tetraphenyl siloxanes having the formula ##STR1## wherein R 1 and R 4 can be hydrogen or lower alkyl, R 2 and R 3 can be hydrogen, phenyl or lower alkyl and n is 0 or 1, when added to methyl...
4538252 Light induced capacitance changes in donor polymers (or small molecules) films and its use for information storage in video disks and the like  
A method for capacitatively storing data on a grooveless storage device is provided. The storage device is comprised of a conductive substrate having a layer of a photosensitive composition which...
4525402 High-density information disc lubricants  
A titanium coupling agent of the formula ##STR1## wherein R 3 is methyl, ethyl or isopropyl and R 4 and R 5 are long chain alkyl groups of 8-20 carbon atoms, when added to a fractionated methyl...
4522747 Capacitance electronic disc molding compositions  
An improved conductive molding composition for the preparation of high density capacitance electronic discs is disclosed. The disclosed compositions are improved by the utilization of a solid...
4517117 Stabilizers for CED compositions  
An improved conductive molding composition for the preparation of high density capacitance electronic discs is disclosed. The disclosed compositions are improved by the replacement of most or all...
4512916 Video disc molding composition  
A conductive molding composition for the compression molding of high density information discs (video discs). The composition includes a polyvinylchloride-based resin containing sufficient carbon...
4486325 High-density information disc lubricants  
Chlorophenyl trialkoxysilane, when added to a fractionated methyl alkyl siloxane lubricant for capacitive electronic discs, improves the playback performance and surface quality of the discs.
4472295 Conductive molding composition and discs therefrom  
A high density capacitive information disc recording medium fabricated from a conductive plastic molding composition including a moldable plastic and conductive carbon black particles having a...
4465617 Method for preparing a molding composition  
A method for obtaining a conductive molding composition for a capacitive information disc record having uniform and predetermined performance properties wherein the conductive molding composition...
4465616 Formulation of electrically conductive plastics  
A method for obtaining a capacitive information disc record conductive molding composition having a desired melt viscosity wherein the conductive molding composition comprises carbon black and a...
4455335 High density information disc lubricants  
Capacitance electronic discs comprising conductive carbon-loaded PVC records are lubricated with a long chain polyalkylethylene lubricant containing 9-phenylstearyl alcohol as a dopant in an amount...
4444820 High density information disc lubricants  
9-Phenylstearyl alcohol, when added to a fractionated methyl alkyl siloxane lubricant for capacitive electronic discs, improves the playback performance and surface quality of the disc.
RE31533 Information carrying discs  
Information-carrying discs are comprised of a substrate having an information bearing layer derived from 15 to 100% by weight of at least one polyacryloyl-containing heterocyclic monomer.
4426692 Rotary recording medium having an improved three frequency pickup tracking control and reproducing apparatus therefor  
A rotary recording medium has at least one surface on which a spiral main track is formed with a reference signal track disposed centrally between mutually adjacent track turns. The track turns of...
4420827 Disc reproducing system  
An information signal recording medium of rotary type has a flat surface with first succession of pits formed therein as respective concavities in response to a first signal and with second...
4405671 Optical information recording disk  
Disclosed herein is an optical information recording disk comprising as a base material thereof a polymer or copolymer having a glass transition temperature of at least 50° C. and a structural...
4405670 Capacitance electronic disc stamper having improved stain resistance and method for the manufacture thereof  
Nickel stampers used for the molding of capacitive electronic discs are treated prior to use in the molding process by heating the stamper in the presence of an oxygen containing gas, at a...
4404599 Laser recording information and pilot signals for tracking on a grooveless recording  
An information signal recording system records an information signal, a first and a second reference signals for tracking control, and a third reference signal for switching the first and second...
4390579 Doped polyphenylene ether lubricant for high density information discs  
High density information discs comprising a conductive carbon-loaded polyvinylchloride disc are lubricated with a polyphenylene ether containing a polar dopant substituted with a long chain alkyl...
4378310 Conductive molding composition  
An improved molding composition having a high thermal stability, including a vinyl chloride/vinyl acetate copolymer-based resin, sufficient finely divided conductive particles to obtain the desired...
4375095 Method and apparatus for testing styli  
A test disc record suitable for use in testing a capacitive playback stylus, which includes a stylus shoe which contacts a capacitive information disc record during playback and a stylus electrode...
4370740 Rotary recording medium  
A rotary recording medium has an information signal along a spiral main track comprising a multiplicity of successively adjacent track turns of respective track turn numbers, first and second...
Matches 1 - 50 out of 88 1 2 >