Granted Patent
Utility
US 4,684,111 · App. 06/829,489
Bent wire spring module
Inventor:
Robert C. Hagemeister
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Feb 14, 1986
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.