Granted Patent
Utility
US 5,672,185 · App. 08/639,947
Abrasive member
Inventor:
Katsumi Ryoke
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Apr 26, 1996
Inventor
Katsumi Ryoke
Assignee (at issue)
Fujitsu Limited
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.