Granted Patent
Utility
US 5,429,501 · App. 08/219,031
Orthodontic coil springs and methods
Inventors:
Farrokh Farzin-Nia, Rohit Sachdeva
Patented Case
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Granted: Jul 4, 1995
Filed: Mar 28, 1994
Inventors
Farrokh Farzin-Nia
Rohit Sachdeva
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.