Granted Patent
Utility
US 5,628,571 · App. 08/528,976
Bearing structure
Inventors:
Mutsuro Ohta, Kohji Takahashi, Shingo Tsuda
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Sep 15, 1995
Inventors
Mutsuro Ohta
Kohji Takahashi
Shingo Tsuda
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.