Number | Date | Country | Kind |
---|---|---|---|
3340600 | Nov 1983 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2428449 | Camras | Oct 1947 | |
3700828 | Zacaroli | Oct 1972 | |
3797031 | Hashimoto | Mar 1974 | |
3895002 | Ridgway et al. | Jul 1975 | |
3969771 | Suzuki et al. | Jul 1976 | |
4593209 | Sloan | Jun 1986 |
Number | Date | Country |
---|---|---|
1173408 | Feb 1959 | FRX |
Entry |
---|
W. D. Kehr and F. B. Shelledy, Making Electromagnetic Shields Including Ferrite, vol. 15, No. 8, Jan. 1973. |
L. F. Shew, Increased Density Magnetic Recording, vol. 2, No. 2, Aug. 1959. |