Granted Patent
Utility
US 4,250,896 · App. 06/047,386
Anti-wrap means
Inventors:
Robert A. Wagstaff, Steven J. Campbell, Mark L. Cozine, Marc Christenson, Ray E. Nooyen
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Jun 11, 1979
Inventors
Robert A. Wagstaff
Steven J. Campbell
Mark L. Cozine
Marc Christenson
Ray E. Nooyen
Assignee (at issue)
Sperry Corp.
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.