Granted Patent
Utility
US 6,835,457 · App. 09/855,916
Marking substrates
Inventors:
Richard J. Larson, Jr., Michael P. Secord, Richard C. Woudenberg
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: May 15, 2001
Inventors
Richard J. Larson, Jr.
Michael P. Secord
Richard C. Woudenberg
Assignee (at issue)
Markem 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.