Granted Patent
Utility
US 4,665,839 · App. 06/808,604
Depository
Inventor:
Leo W. Heyl
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Dec 13, 1985
Inventor
Leo W. Heyl
Assignee (at issue)
Mosler, 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.