Granted Patent
Utility
US 4,669,978 · App. 06/832,329
Heat treating basket
Inventor:
Rudolf Klefisch
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Feb 24, 1986
Inventor
Rudolf Klefisch
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.