Granted Patent
Utility
US 6,483,873 · App. 09/991,789
Medium and method for protection of data reproduction according to both medium protection data and apparatus protection data
Inventor:
Takayuki Sugahara
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Nov 26, 2001
Inventor
Takayuki Sugahara
Assignee (at issue)
Victor Company of Japan, 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.