Granted Patent
Utility
US 4,555,443 · App. 06/624,097
Magnetic recording medium
Inventors:
Shozo Kikugawa, Yoshitaka Yasufuku
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Jun 25, 1984
Inventors
Shozo Kikugawa
Yoshitaka Yasufuku
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.