Granted Patent
Utility
US 4,475,345 · App. 06/401,208
Refrigerator with pneumatic and working gas-supply control
Inventors:
Hans-Joachim Forth, Rolf Heisig
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Jul 23, 1982
Inventors
Hans-Joachim Forth
Rolf Heisig
Assignee (at issue)
Leybold-Heraeus GmbH
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.