Granted Patent
Utility
US 4,595,181 · App. 06/632,047
Bent wire spring unit
Inventor:
Robert C. Hagemeister
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: Jul 18, 1984
Inventor
Robert C. Hagemeister
Assignee (at issue)
Webster Spring Co. Inc.
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.