Granted Patent
Utility
US 4,446,140 · App. 06/362,933
Method and composition for treating mouth pain
Inventor:
Eric L. Nelson
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Mar 29, 1982
Inventor
Eric L. Nelson
Assignee (at issue)
Nelson Research & Development Company
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.