Granted Patent
Utility
US 6,210,471 · App. 09/653,684
Marking composition and method for marking dark substrates
Inventor:
Michael S. Craig
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Sep 1, 2000
Inventor
Michael S. Craig
Assignee (at issue)
BINNEY & SMITH 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.