Granted Patent
Utility
US 4,291,045 · App. 06/152,886
Method of reducing dental caries
Inventors:
Donald A. M. Mackay, Frank Witzel, Harald A. B. Linke
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: May 23, 1980
Inventors
Donald A. M. Mackay
Frank Witzel
Harald A. B. Linke
Assignee (at issue)
Lifesavers LLC
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.