| Number | Name | Date | Kind |
|---|---|---|---|
| D277859 | Saito et al. | Mar 1985 | |
| D278242 | Saito | Apr 1985 | |
| 4658318 | Bauck et al. | Apr 1987 | |
| 4845582 | Tanaka et al. | Jul 1989 | |
| 4849844 | Kato | Jul 1989 |
| Entry |
|---|
| International Business Machines Corporation, The IBM Personal Computing Catalog, pp. 11 and 30, 1988. |
| Freese, Robert P., "Optical Disks Become Erasable," IEEE Spectrum, pp. 41-45, Feb. 1988. |