Granted Patent
Utility
US 4,847,568 · App. 07/052,425
Microwave apparatus
Inventor:
Nils Nazoa-Ruiz
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: May 21, 1987
Inventor
Nils Nazoa-Ruiz
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.