Granted Patent
Utility
US 5,694,664 · App. 08/679,619
Coupling for spiral counterbalance
Inventors:
William P. Newton, John I. Habbersett
Patented Case
View Patent ↗
Granted: Dec 9, 1997
Filed: Jul 10, 1996
Inventors
William P. Newton
John I. Habbersett
Assignee (at issue)
CALDWELL 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.