Granted Patent
Utility
US 5,363,522 · App. 08/204,546
Spring assembly and perimeter support spring therefor
Inventor:
Kevin McGraw
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Mar 2, 1994
Inventor
Kevin McGraw
Assignee (at issue)
HICKORY SPRINGS MANUFACTURING 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.