Granted Patent
Utility
US 5,442,604 · App. 07/983,028
Access control device
Inventor:
Yutaka Osada
Patented Case
View Patent ↗
Granted: Aug 15, 1995
Filed: Nov 30, 1992
Inventor
Yutaka Osada
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.