Granted Patent
Utility
US 5,503,506 · App. 08/083,244
High precision, high surface finish broaching tool
Inventor:
Lin Yuan
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Jun 24, 1993
Inventor
Lin Yuan
Assignee (at issue)
Hughes Aircraft Company
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.