Granted Patent
Utility
US 4,956,530 · App. 07/404,644
Method of operation and device for even heating by means of microwaves
Inventor:
Klaus Koch
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Sep 8, 1989
Inventor
Klaus Koch
Assignee (at issue)
Hermann Berstorff Maschinenbau 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.