Granted Patent
Utility
US 5,281,133 · App. 07/976,519
Rapid palatal expansion device
Inventor:
Farrokh Farzin-Nia
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Nov 16, 1992
Inventor
Farrokh Farzin-Nia
Assignee (at issue)
Ormco Corporation
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.