Granted Patent
Utility
US 4,961,743 · App. 07/292,986
Torsion spring
Inventors:
George Kees, Jr., Charles Bridgham Worrick, III, John A. Santangelo
Patented Case
View Patent ↗
Granted: Oct 9, 1990
Filed: Jan 3, 1989
Inventors
George Kees, Jr.
Charles Bridgham Worrick, III
John A. Santangelo
Assignee (at issue)
Codman & Shurtleff, 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.