Granted Patent
Utility
US 4,839,503 · App. 07/130,787
Controlling the simmering or cooking time in a cooking vessel
Inventors:
Kurt Wolf, Wolfram K. Andre
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Dec 9, 1987
Inventors
Kurt Wolf
Wolfram K. Andre
Assignee (at issue)
Fissler 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.