Granted Patent
Utility
US 5,616,142 · App. 08/277,764
Vertebral auxiliary fixation device
Inventors:
Hansen Yuan, Chih-I Lin
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: Jul 20, 1994
Inventors
Hansen Yuan
Chih-I Lin
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.