Granted Patent
Utility
US 4,556,771 · App. 06/632,353
Microwave feed for common cavity oven
Inventor:
Calvin J. Thomas
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Jul 19, 1984
Inventor
Calvin J. Thomas
Assignee (at issue)
Raytheon Company
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.