Granted Patent
Utility
US 4,882,721 · App. 07/163,156
Offset for protection against amorphous pips
Inventors:
Roger R. Bracht, Johannes J. Verboom
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Feb 24, 1988
Inventors
Roger R. Bracht
Johannes J. Verboom
Assignee (at issue)
Laser Magnetic Storage International Company
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.