Number | Date | Country | Kind |
---|---|---|---|
54-64231 | May 1979 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4052749 | Nomura | Oct 1977 | |
4115827 | Gooch | Sep 1978 | |
4149205 | Berghof | Apr 1979 |
Entry |
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IBM Technical Disclosure Bulletin, vol. 15, No. 7, Dec., 1972, p. 2182, "Electromagnetic Transducer With Thin-Film Pole Pieces", A. Paton. |
IBM Technical Disclosure Bulletin, vol. 7, No. 11, Apr., 1965, p. 993, "Fabrication of Narrow Track Width, High-Density Ferrite Head", Frost et al. |