Granted Patent
Utility
US 6,607,813 · App. 09/935,933
Simulated security thread by cellulose transparentization
Inventors:
David E. Washburn, Harry Allen Seifert, Watson Gullett, Rajendra Mehta
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Aug 23, 2001
Inventors
David E. Washburn
Harry Allen Seifert
Watson Gullett
Rajendra Mehta
Assignee (at issue)
Standard Register, 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.