Granted Patent
Utility
US 6,464,924 · App. 09/543,406
Method of forming a custom mask using an impression mask
Inventor:
W. Keith Thornton
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Apr 5, 2000
Inventor
W. Keith Thornton
Assignee (at issue)
W. Keith Thornton
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.