Granted Patent
Utility
US 4,550,054 · App. 06/545,960
Magnetic recording medium
Inventors:
Yasuhisa Yamauchi, Masao Asano, Mitsutaka Arai
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Oct 27, 1983
Inventors
Yasuhisa Yamauchi
Masao Asano
Mitsutaka Arai
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.