Granted Patent
Utility
US 5,492,744 · App. 08/159,585
Optical information recording medium and composition for optical information recording film
Inventors:
Tadashi Koike, Hideki Umehara, Yuji Inatomi, Takeshi Tsuda, Sumio Hirose
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Dec 1, 1993
Inventors
Tadashi Koike
Hideki Umehara
Yuji Inatomi
Takeshi Tsuda
Sumio Hirose
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
YAMAMOTO CHEMICALS, INC.
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.