Granted Patent
Utility
US 3,930,311 · App. 05/426,487
Reinforced orthodontic bracket
Inventor:
Lawrence F. Andrews
Patented Case
View Patent ↗
Granted: Jan 6, 1976
Filed: Dec 20, 1973
Inventor
Lawrence F. Andrews
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.