Granted Patent
Utility
US 5,855,979 · App. 08/904,549
Optical recording medium
Inventors:
Hideki Umehara, Jun TOKUHIRO, Yuji Inatomi, Tomoyoshi Sasakawa, Tsutami Misawa, Kenichi Sugimoto, Taizo Nishimoto, Takeshi Tsuda
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Aug 4, 1997
Inventors
Hideki Umehara
Jun TOKUHIRO
Yuji Inatomi
Tomoyoshi Sasakawa
Tsutami Misawa
Kenichi Sugimoto
Taizo Nishimoto
Takeshi Tsuda
Assignee (at issue)
MITSUI 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.