Granted Patent
Utility
US 5,672,462 · App. 08/661,071
Optical recording medium
Inventors:
Keisuke Takuma, Tsutami Misawa, Kenichi Sugimoto, Taizo Nishimoto, Takeshi Tsuda, Hideki Umehara
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Jun 10, 1996
Inventors
Keisuke Takuma
Tsutami Misawa
Kenichi Sugimoto
Taizo Nishimoto
Takeshi Tsuda
Hideki Umehara
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.