Granted Patent
Utility
US 5,283,094 · App. 07/873,958
Optical recording medium
Inventors:
Tomoyoshi Sasakawa, Nobuhisa Kitagawa, Tadashi Koike, Hiroyuki Hyakutake
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Apr 27, 1992
Inventors
Tomoyoshi Sasakawa
Nobuhisa Kitagawa
Tadashi Koike
Hiroyuki Hyakutake
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.