Granted Patent
Utility
US 6,144,178 · App. 09/370,782
Disk drive with controlled reduced internal pressure
Inventors:
Toshiki Hirano, Kiyoshi Satoh
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Aug 5, 1999
Inventors
Toshiki Hirano
Kiyoshi Satoh
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.