Number | Date | Country | Kind |
---|---|---|---|
10-010714 | Jan 1998 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
5898541 | Boutaghou | Apr 1999 |
Number | Date | Country |
---|---|---|
5-250793 | Sep 1993 | JPX |
Entry |
---|
Harold Hamilton, "Contact Recording on Perpendicular Rigid Media", Journal of the Magnetics Society of Japan, vol. 15 Supplement, No. S2 (1991), pp. 483-490. |