| Patent Number |
Title Of Patent |
Date Issued |
| 5516469 |
Process for producing substrate sheet for information recording mediums |
May 14, 1996 |
| The present invention provides a process using a roll stamper which molds a substrate sheet for information recording mediums by continuously transferring preformat patterns on a resin sheet. The roll stamper has the feature that the preformat pattern on the roll stamper has a value of b |
| 5324188 |
Roller stamper for molding a substrate sheet to become an information recording medium |
June 28, 1994 |
| A roll stamper which molds a substrate resin sheet into an information recording media by continuously transferring preformat patterns on the substrate resin sheet, and a production process therefor. The preformat pattern on the roll stamper has a value of b/a of greater than 1 when the |
| 5266136 |
Process for producing a roll stamper for molding a substrate sheet for information recording med |
November 30, 1993 |
| A process for producing a roll stamper which molds a substrate sheet for information recording mediums by continuously transferring preformat patterns on a resin sheet. The roll stamper has the feature that the preformat pattern on the roll stamper has a value b/a of greater than 1, |
| 5248584 |
Optical card and method for reading information recorded in it |
September 28, 1993 |
| An optical card comprises a transparent substrate having a track groove on its surface, an optical recording layer provided on said track groove, and an opaque card substrate provided in such a manner that it may be contiguous to said optical recording layer, wherein an unrecordable part |
| 5147592 |
Process of and apparatus for preparing optical recording medium substrates |
September 15, 1992 |
| A process for preparing a substrate sheet for optical recording mediums includes the steps of extruding a molten resin to form a resin sheet and bringing the resin sheet into pressure between a preformat roll and a roll disposed opposingly to said preformat roll to transfer a preformat p |
| 4871601 |
Optical information recording carrier |
October 3, 1989 |
| An optical information recording carrier comprises an optical recording layer provided on a transparent substrate, a film coating layer laminated with out adhesion on said optical recording layer, and further a fixing layer laminated thereon to fix said film coating layer. |
| 4289301 |
Post for a guard rail |
September 15, 1981 |
| A post for a guard rail used on a highway. Said post is made of an aluminum cast alloy, and is formed in an I-shape in a horizontal cross section, having a central web and front and rear flanges, and being wider at its lower portion. A mechanical neutral plane of the post along the width |
