| Patents for G11B 11 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group; Record carriers therefor (14,351) |
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| 07/23/1985 | US4531205 Optoelectronic method of reading data on a magnetic medium and circuit for performing said method |
| 07/10/1985 | EP0147436A1 Apparatus for reading magnetically recorded information. |
| 07/09/1985 | US4528588 Method and apparatus for marking the information content of an information carrying signal |
| 07/09/1985 | CA1190321A1 Magneto-optical head assembly |
| 06/26/1985 | EP0146323A2 Methods of making magnetic recording media(111111]) |
| 06/26/1985 | EP0044840B1 Information carrying discs |
| 06/25/1985 | US4525824 Information recording system |
| 06/11/1985 | CA1188802A1 Method of information recording on a semiconductor wafer |
| 06/05/1985 | EP0143470A2 Information recording medium |
| 06/04/1985 | US4521876 Focusing state monitoring apparatus in optical recording apparatus |
| 05/23/1985 | WO1985002292A1 Method of manufacturing photothermomagnetic recording film |
| 05/21/1985 | US4518657 Recording medium and recording-reproduction system provided with the recording medium |
| 05/15/1985 | EP0141679A2 Optical system in a magneto-optical memory device |
| 05/14/1985 | US4517667 Direct read after write optical disk system |
| 05/02/1985 | EP0139474A2 Magneto-optic memory element |
| 04/16/1985 | CA1185648A1 System and film gate for accurately imaging information on a film by a charged particle beam |
| 04/10/1985 | EP0136723A2 Recording carrier comprising an amorphous magnetooptic recording medium layer consisting of rare earth-transition armorphous metal formed on a plastic substrate |
| 04/10/1985 | EP0136574A1 Magneto-optical apparatus |
| 04/10/1985 | EP0136346A1 Information storage medium and method of recording and retrieving information thereon |
| 04/09/1985 | US4510544 Optoelectronic device for reading data contained on a magnetic medium |
| 04/02/1985 | CA1185013A1 Magneto-optic memory medium |
| 03/27/1985 | EP0135322A1 An optical magnetic recording member |
| 03/14/1985 | WO1985001144A1 Photomagnetic recording and reproducing apparatus having device for detecting direction of magnetization of magnetic recording medium |
| 03/12/1985 | US4504940 Stylus for use with video disc and method of grinding such stylus |
| 03/12/1985 | US4504934 Optical signal reproducing apparatus |
| 03/12/1985 | CA1183950A1 Method for processing an information signal and means for carrying out the method |
| 03/05/1985 | CA1183605A1 Metallized information carrying discs |
| 02/05/1985 | US4497870 Rare earth-transittional-metal alloy containing germanium |
| 02/05/1985 | US4497534 Holographic optical head |
| 01/29/1985 | US4497007 Magneto-optical storage process |
| 01/29/1985 | US4497006 Magneto-optic recording/playback head assembly |
| 01/22/1985 | US4495530 Method of processing information signal with respect to opto-magnetic record medium |
| 01/17/1985 | WO1985000239A1 Apparatus for reading magnetically recorded information |
| 01/15/1985 | US4493887 Transparent support plates, ferrite recording and reflective layer |
| 01/02/1985 | EP0129605A1 Thermomagnetic optical recording method |
| 01/01/1985 | US4491941 Reproducing stylus for an information signal recording medium |
| 12/27/1984 | EP0128960A1 Thermomagnetic optical recording/reproducing method |
| 12/27/1984 | CA1180115A Thermomagnetic recording method |
| 12/18/1984 | US4489139 Substrate with strip like grooves |
| 12/11/1984 | CA1179400A1 Method of recording information on a medium in the form of electrical signals |
| 12/05/1984 | EP0127243A1 Thermo-magneto-optical recording device and recording element therefor |
| 11/28/1984 | EP0126596A2 Magneto-optic recording apparatus |
| 11/28/1984 | EP0126594A1 Method for manufacturing an optical memory element |
| 11/28/1984 | EP0126589A2 Multi-layer amorphous optical recording medium |
| 11/28/1984 | EP0126565A1 Improvements relating to data storage and recording |
| 11/21/1984 | EP0125881A2 Amorphous magneto optical recording medium |
| 11/21/1984 | EP0125536A2 Thermo-magnetic recording materials supporting small stable domains |
| 11/21/1984 | EP0125535A2 Rapid thermo-magnetic recording disk printer and master disk for same |
| 11/21/1984 | EP0125534A2 Thermo-magnetic recording of binary digital information |
| 11/13/1984 | CA1177954A1 Rotary recording medium and a recording system thereof |
| 11/08/1984 | WO1984004420A1 Data storage and recording |
| 11/06/1984 | CA1177577A1 Magnetooptical recording medium and recording-and- reproducing device using the same |
| 10/31/1984 | EP0123048A1 Holographic optical head |
| 10/24/1984 | EP0122816A2 Optical focus position control in an optical memory system |
| 10/23/1984 | US4478768 Method for manufacturing optical type recording medium |
| 10/16/1984 | US4477852 Magneto-optical recording and reproducing system |
| 10/09/1984 | CA1175706A1 Light induced capacitance changes in donor polymers (or small molecules) films and its use for information storage in video disks and the like |
| 09/25/1984 | CA1174882A1 Plane grating polarizing beamsplitter |
| 09/18/1984 | US4472748 Method of processing information signal with respect to opto-magnetic record medium |
| 09/12/1984 | EP0117910A1 Apparatus for signal evaluation by accumulation at one rate and releasing and testing at a slower rate |
| 09/12/1984 | EP0117909A1 Method of and apparatus for evaluating the audio characteristics under the control of a video picture frame number |
| 09/12/1984 | EP0117908A1 Method of and apparatus for analyzing the signal transfer characteristics of a signal processing unit |
| 09/11/1984 | CA1174176A1 Keel-tipped stylus, and method and device for making keel-tipped stylus |
| 08/30/1984 | WO1984003388A1 Information storage medium and method of recording and retrieving information thereon |
| 08/22/1984 | EP0116135A1 Method of evaluating and apparatus for analyzing recording characteristics of a recording medium with a prescribed analog electrical signal |
| 08/21/1984 | US4467383 Magnetooptic memory medium |
| 08/15/1984 | EP0115666A2 Optical focus position control in optical disc apparatus |
| 08/14/1984 | US4466035 Magneto-optic media and system optimization |
| 08/14/1984 | US4466004 Thermomagnetic recording |
| 08/08/1984 | EP0115458A2 Optical focussing device for read-out of a record carrier in procession |
| 08/07/1984 | US4464437 Nonmagnetizable substrate; amorphous alloy layer of bi, rare earth, and a transition element; magnetic anisotropy |
| 07/31/1984 | US4463389 System for recording and playing back continuous-play and stop-motion signals |
| 07/18/1984 | EP0113426A1 Method and apparatus for analyzing the information transfer characteristics of a recording medium |
| 07/18/1984 | EP0113425A1 Method of and apparatus for establishing the characteristics of a prerecorded two-channel audio program |
| 07/05/1984 | WO1984002603A1 Thermomagnetic optical recording/reproducing method |
| 07/05/1984 | WO1984002602A1 Thermomagnetic optical recording method |
| 06/27/1984 | EP0111988A1 Magneto-optic memory device |
| 06/21/1984 | WO1984002420A1 Image forming and data storage |
| 06/21/1984 | WO1984002419A1 Improvements relating to data storage and recording |
| 06/19/1984 | US4455563 System and film gate for accurately imaging information on a film by a charged particle beam |
| 06/13/1984 | EP0110730A2 Improvements relating to data storage and recording |
| 06/13/1984 | EP0110729A2 Image forming and data storage |
| 06/13/1984 | EP0110622A1 Head for recording an information signal in and reproducing the same from a semiconductor recording medium |
| 06/05/1984 | US4452748 Process for obtaining a copy disk from an original recording carried by a matrix |
| 05/29/1984 | US4451863 Information reproducing apparatus based on opto-magnetic effect |
| 05/22/1984 | US4450551 Keel-tipped stylus, and method and device for making keel-tipped stylus |
| 05/16/1984 | EP0108457A1 Method for the production of an optical recording element |
| 05/09/1984 | EP0107754A1 Apparatus for magneto-optical information storage |
| 05/02/1984 | EP0107589A1 Device for recording information on a magnetic carrier |
| 04/04/1984 | EP0104675A1 Magneto-optical element on the basis of Pt-Mn-Sb |
| 03/21/1984 | EP0103170A2 Information holding device |
| 03/20/1984 | US4438508 Rare-earth metal and transition metal alloy layer |
| 03/20/1984 | US4438443 Method of recording information on a medium in the form of electrical signals |
| 02/28/1984 | US4434477 Mechanically addressed optical memory |
| 02/21/1984 | US4433402 Reference signal detection circuit in a rotary recording medium reproducing apparatus |
| 01/10/1984 | US4425636 Method and apparatus for reproducing optically an information recorded on a record medium along tracks |
| 01/10/1984 | US4425023 Beam spot scanning device |
| 01/03/1984 | US4424580 Method and apparatus for generating electron spin reversal in ferrimagnetic material |
| 12/28/1983 | EP0097035A1 Optical disk scanning system |
| 12/27/1983 | US4423495 Method and apparatus for recording optically an information signal on a record medium along tracks |