Granted Patent
Utility
US 6,409,864 · App. 09/498,377
Method of assembly of pleated filter with spacer insert
Inventor:
Kyung-Ju Choi
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Feb 3, 2000
Inventor
Kyung-Ju Choi
Assignee (at issue)
AAF International, Inc.
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.