Granted Patent
Utility
US 6,487,051 · App. 09/711,340
Ramp for information recording disk apparatus
Inventors:
Ichiroh Koyanagi, Tsai-Wei Wu
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Nov 9, 2000
Inventors
Ichiroh Koyanagi
Tsai-Wei Wu
Assignee (at issue)
International Business Machines Corporation
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.