United States patent digest, 1979, class 360
Subtitle: dynamic magnetic information storage or retrieval.
Publisher: Boston Patent Co.
Published: 1981
Place of publication: Needham Heights, Mass. (P.O. Box 55, Needham Heights 02194)
Language: eng
Number of pages: 293
Subjects: Magnetic recorders and recording -- Patents.
Other titles: U.S. patent digest, 1979, class 360.