Granted Patent
Utility
US 6,792,535 · App. 09/528,362
System and method for digitally marking a file with a removable mark
Inventor:
John Kwan
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Mar 17, 2000
Inventor
John Kwan
Assignee (at issue)
KWAN SOFWARE ENGINEERING, 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.