レムケ・狭ギャップヘッド記録特許と1960〜70年代の日本の磁気記録の研究

概要

論文の詳細を見る
A patent litigation case relevant to magnetic recording is introduced from technical and historical viewpoint. The patent in question claimed high-density recording using a narrow head gap of less than 0.38μm. The patentee argued that it covered the vector recording technology studied by the inventor, J.U. Lemke. Investigation of the argument in the light of studies made by S.Iwasaki and his group, the NHK Technical Lab. and others during the 1960s and 1970s in Japan, reveals that Lemke's patent disclosed nothing that had not already been discovered in Japanese research up to that data. The patent was finally rejected.
社団法人日本磁気学会の論文
1999-01-01