Granted Patent
Utility
US 4,698,280 · App. 06/773,808
Magnetic recording medium
Inventors:
Kiyomitsu Mine, Yayoi Kobayashi, Yasushi Kawaguchi, Hiroyuki Inokuma
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Sep 9, 1985
Inventors
Kiyomitsu Mine
Yayoi Kobayashi
Yasushi Kawaguchi
Hiroyuki Inokuma
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.