| Patent Number |
Title Of Patent |
Date Issued |
| 5904969 |
Optical data recording medium and manufacturing method thereof |
May 18, 1999 |
| 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 pattern on a transparent subst |
| 5432662 |
Data recording cartridge including a flexible magnetic recording medium |
July 11, 1995 |
| A data recording cartridge provided with a cartridge case and a recording medium accommodated therein, wherein the cartridge case is molded from at least one of the following materials:(1) composition of uniformly dispersed styrol resin and a polycarbonate resin;(2) composition of unifor |
| 5383078 |
Magnetic disk assembly having a hub with a circular recess extending circumferentially along an |
January 17, 1995 |
| A magnetic disk comprises a flexible disk-shaped magnetic sheet with a magnetic layer formed on a substrate film and having an aperture in the center of the disk; a center hub made of metal sheet and having a flange on its outer peripheral part, fabricated by inserting the center hub int |
| 5355270 |
Magnetic recording medium having a reference track structure for improved optical tracking |
October 11, 1994 |
| A magnetic recording medium in which the center of a magnetic head can be brought to a centerline of a reference track, thereby enhancing the reliability of the magnetic recording medium, the reference track being provided at a predetermined position of a magnetic layer of the medium, a |
| 5319507 |
Recording/reproducing system using a flexible magnetic disk |
June 7, 1994 |
| A magnetic recording/reproducing apparatus and method, the apparatus including a drive mechanism for driving a flexible magnetic disk loaded thereon to rotate, the magnetic disk being comprised of a transparent and flexible base film formed with first and second magnetic layers on both |
| 5317467 |
Data recording cartridge including a flexible magnetic recording medium |
May 31, 1994 |
| A data recording cartridge provided with a cartridge case and a recording medium accommodated therein, wherein the cartridge case is molded from at least one of the following materials:(1) composition of uniformly dispersed styrol resin and a polycarbonate resin;(2) composition of unifor |
| 5140490 |
Shutter for a cartridge case |
August 18, 1992 |
| A shutter for a cartridge is adapted to be mounted on a cartridge case of the cartridge so as to open and close a head insertion hole in the cartridge case housing a recording medium therein the shutter being made of a synthetic resin and includes a pair of opposed flat plate portions |
| 5121380 |
Disc cartridge shutter |
June 9, 1992 |
| A disc cartridge comprising a cartridge case having head insert openings and encasing a disc-type recording medium rotatably mounted therein and a shutter for opening and closing the head insert openings mounted on the cartridge case, the shutter being molded from a synthetic resin mater |
| 5006948 |
Disk cartridge with improved cleaning mechanism |
April 9, 1991 |
| A disk cartridge comprises a cartridge case including an upper case, a lower case and a head insertion aperture at a predetermined position, a pair of cleaning sheets respectively secured to inner surfaces of the upper and lower cases, a disk disposed rotatably between the cleaning s |
| 4734815 |
Disc cartridge with a cleaning mechanism |
March 29, 1988 |
| A disc cartridge which comprises an outer case formed of a top half and a bottom half assembled to the top half to provide a disc chamber for accommodating a recording disc adapted to be rotated, a pair of pressure plates mounted in the top half and bottom half so as to oppose each other |
