Granted Patent
Utility
US 4,651,536 · App. 06/570,233
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Inventor:
Heinz Nax
Patented Case
View Patent ↗
Granted: Mar 24, 1987
Filed: Aug 19, 1983
Inventor
Heinz Nax
Assignee (at issue)
Naz GmbH & Co.
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.