Granted Patent
Utility
US 4,571,129 · App. 06/670,947
Mandrel assembly
Inventor:
Kevin O. Strand
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Nov 13, 1984
Inventor
Kevin O. Strand
Assignee (at issue)
Erickson Tool 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.