Granted Patent
Utility
US 4,215,983 · App. 05/703,828
Orthodontic headgear appliance safety system
Inventor:
Paul D. Frazier
Patented Case
View Patent ↗
Granted: Aug 5, 1980
Filed: Jul 9, 1976
Inventor
Paul D. Frazier
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.