| Patent Number |
Title Of Patent |
Date Issued |
| 4441179 |
Optical video disc structure |
April 3, 1984 |
| A symmetrical video disc structure and method for making the structure are described. The video disc structure is symmetrical about a plane passing through a core member and equidistant and parallel to a first information bearing surface and a second information bearing surface carried b |
| 4313190 |
Method for making a composite video disc |
January 26, 1982 |
| A symmetrical video disc structure and method for making the structure are described. The video disc structure is symmetrical about a plane passing through a core member and equidistant and parallel to a first information bearing surface and a second information bearing surface carried b |
| 4310919 |
Optical video disc structure |
January 12, 1982 |
| A symmetrical video disc structure and method for making the structure are described. The video disc structure is symmetrical about a plane passing through a core member and equidistant and parallel to a first information bearing surface and a second information bearing surface carried b |
