| Patents for G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (102,715) |
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| 08/06/1991 | US5038333 Positioning systems including reliable track crossing detection for high speed relative motions |
| 08/06/1991 | US5038332 Optical information recording medium including an optically detectable mark representing a boundary between the recording and non-recording areas |
| 08/06/1991 | US5038321 Eraseable electro-optic storage disk, method of and apparatus for recording and reading data therefor |
| 08/06/1991 | US5038166 Optical image recording apparatus |
| 07/31/1991 | EP0439383A1 Device to read oblong segments from a moving recording medium |
| 07/31/1991 | EP0439196A2 Optical disk |
| 07/31/1991 | EP0439100A2 Optical head device |
| 07/31/1991 | EP0438828A1 Method of and device for providing a record carrier with a pattern of areas having modified optical properties |
| 07/31/1991 | EP0438784A2 Apparatus for generating clock signals for data reproduction |
| 07/31/1991 | EP0188625B1 Method of producing optical data recording medium |
| 07/31/1991 | CN1013416B Optical disc player |
| 07/30/1991 | US5036519 Semiconductor laser controller |
| 07/30/1991 | US5036511 Recording method and apparatus |
| 07/30/1991 | US5036510 Optical recording disk |
| 07/30/1991 | US5036507 Tilting mechanism for optical pickup unit |
| 07/30/1991 | US5036506 Record carrier scanning apparatus with feedback control system for controlling scanning point position and velocity |
| 07/30/1991 | US5036505 Data reproduction arrangement for recalling data readable with an optical pickup from a recorded medium |
| 07/30/1991 | US5036504 Optical head using a reflection grating |
| 07/30/1991 | US5036419 Electro-mechanical transducing element and a moving device using the same |
| 07/30/1991 | US5036185 Optical apparatus for detecting a focusing state |
| 07/25/1991 | WO1991010994A1 Low energy recording process |
| 07/25/1991 | WO1991010993A1 High temperature, high humidity stabilization process for optical information storage media containing polycarbonate substrates |
| 07/25/1991 | WO1991010992A1 Dye-enhanced deposition of elemental metals and metalloids on substrates |
| 07/25/1991 | DE4041302A1 Optical pick=up for disc systems - has reflected signals separated into polarised components for precise track control |
| 07/24/1991 | EP0438376A1 Photochromic naphthacenchinones, process for their production and their use |
| 07/24/1991 | EP0438355A1 Method for reading a synchronizing signal from a record medium and an apparatus therefor |
| 07/24/1991 | EP0438297A2 Objective lens cleaning cartridge |
| 07/24/1991 | EP0438225A1 A fluorescent optical disk |
| 07/24/1991 | EP0438054A2 Method and apparatus for controlling a small spacing between a magnetic head and a magnetic recording medium |
| 07/24/1991 | EP0438042A2 Utilizing wasted laser light in optical systems |
| 07/24/1991 | EP0437928A2 Memory management in a multi-processor system |
| 07/24/1991 | EP0437891A1 Read and/or write device |
| 07/24/1991 | EP0437863A1 Infra-red laser beam sensitive recording material |
| 07/24/1991 | CN1053317A Information processing apparatus and optial head incorporated therein |
| 07/24/1991 | CN1013319B Optical disc |
| 07/23/1991 | US5034943 Information storage device |
| 07/23/1991 | US5034942 System having a function of reproducing optical information |
| 07/23/1991 | US5034941 Optical disk apparatus having auto-focusing servo systems for multiple light spots and method of starting the auto-focusing servo systems |
| 07/23/1991 | US5034940 Information retrieval system with a tracking error threshold compensation of retrieved data and tracking error signals |
| 07/23/1991 | US5034939 Apparatus for selectively playing back and recording data on a disk in which the bit error rate is held minimum |
| 07/23/1991 | US5034938 Optical disc recording and playing apparatus |
| 07/23/1991 | US5034914 Optical disk data storage method and apparatus with buffered interface |
| 07/23/1991 | US5034613 Two-photon laser microscopy |
| 07/23/1991 | US5034482 Process for producing polymer by ring-opening polymerization |
| 07/23/1991 | US5034313 Images formed by the application of heat on a colloid |
| 07/23/1991 | US5034309 Used for forming a recording layer |
| 07/23/1991 | US5034255 Optical recording medium and method of its production |
| 07/23/1991 | CA1286610C Optical recording tape with continuous prerecorded tracks |
| 07/20/1991 | WO1991011003A1 Method of recording and reproducing data |
| 07/20/1991 | WO1991011002A1 Data recording and reproducing methods |
| 07/19/1991 | CA2034316A1 Photochromic naphthacenequinones, process for their preparation and the use thereof |
| 07/17/1991 | EP0437223A2 Optical data medium cassette |
| 07/17/1991 | EP0437135A1 Optical recording medium which can be written to thermo-optically, a process for producing such a medium and record carrier using such a medium |
| 07/17/1991 | EP0436939A2 Optical disk data reproducing apparatus |
| 07/17/1991 | EP0436877A2 Reproducing apparatus for a disc |
| 07/16/1991 | US5033043 Optical head apparatus for optical disks |
| 07/16/1991 | US5033042 Optical apparatus for optical pickup |
| 07/16/1991 | US5033041 A tracking circuit for returning an optical beam to a track being scanned on a compact disk after being jarred away |
| 07/16/1991 | US5033040 Optical information recording and reproducing apparatus with tracking error control |
| 07/16/1991 | US5033037 Track access control circuit of optical disk unit |
| 07/16/1991 | US5032973 Optical recording material containing photochromic compounds |
| 07/16/1991 | US5032776 Attenuation filter |
| 07/16/1991 | US5032495 Tetraazaporphyrins and optical recording medium |
| 07/16/1991 | US5032489 Optically functional element |
| 07/16/1991 | US5032470 Optical recording medium with an aluminum alloy metallic layer containing at least hafnium |
| 07/16/1991 | US5032009 Polarized light exposure |
| 07/16/1991 | US5031993 Detecting polarization state of an optical wavefront |
| 07/16/1991 | CA1286411C Information storage apparatus |
| 07/11/1991 | WO1991010234A1 Multitrack magneto-optical reading head |
| 07/11/1991 | WO1991010233A1 Protective, vibration damping, stabilizer rings for optical discs |
| 07/11/1991 | WO1991010232A1 Optical scanning device |
| 07/11/1991 | WO1991010231A1 System and method for erasing light-responsive optical disks |
| 07/11/1991 | DE4033682A1 Restorable colour photographic optical disk based on di:aryl deriv. - passing between 3 different logical states in response to various wavelengths |
| 07/10/1991 | EP0436441A2 Data reproducing apparatus |
| 07/10/1991 | EP0436424A1 Magnetooptical read head |
| 07/10/1991 | EP0436378A2 Disc player and optical head feeding apparatus |
| 07/10/1991 | EP0436372A2 Thermoplastic materials and article made therefrom |
| 07/10/1991 | EP0436228A2 Recording and reproducing methods |
| 07/10/1991 | EP0436018A1 Disk-like recording medium |
| 07/10/1991 | EP0210275B1 Recording/reproducing apparatus using magneto-optical disk |
| 07/10/1991 | EP0207164B1 Apparatus for recording and reproducing optical recording card |
| 07/09/1991 | US5031172 Unit and disc having a relatively rough surface and method of producing |
| 07/09/1991 | US5031170 Optical pick-up device |
| 07/09/1991 | US5031168 Apparatus and method for increasing storage capacity of recording media |
| 07/09/1991 | US5031167 Focus error detection system for an optical recording/reproducing system |
| 07/09/1991 | US5031166 Optical disk tracking and seeking systems and specific track formats using discontinuities and circuitry therefor |
| 07/09/1991 | US5031165 Optical information recording/reproducing apparatus |
| 07/09/1991 | US5031162 Magneto-optical recorded medium with a transparent substrate layer |
| 07/09/1991 | US5031112 System for detecting defective portions in data recording portions of optical recording medium |
| 07/04/1991 | CA2033470A1 Method for the manufacture of objects from polycarbonate |
| 07/03/1991 | EP0435779A2 Semiconductor optical memory device for optical storage of information with increased recording density |
| 07/03/1991 | EP0435754A1 Method of linking coded data to be recorded on a writable optical disc |
| 07/03/1991 | EP0435647A2 Optical pickup |
| 07/03/1991 | EP0435646A2 Target track position retrieval device |
| 07/03/1991 | EP0435422A2 Information-recorded disk carrying tracking pilot signal and playing apparatus therefor |
| 07/03/1991 | EP0435348A2 Optical head |
| 07/03/1991 | EP0435289A1 Video disk recording apparatus |
| 07/03/1991 | EP0434769A1 Cover for mirrors of sun visors of motor vehicles |
| 07/03/1991 | EP0376958A4 Updatable micrographic pocket data card |
| 07/03/1991 | EP0215846B1 Two-sided optical recording medium |