Granted Patent
Utility
US 4,367,728 · App. 06/184,299
Isolation apparatus
Inventor:
Hans Guido Mutke
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Sep 5, 1980
Inventor
Hans Guido Mutke
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.