Granted Patent
Utility
US 5,021,713 · App. 07/338,022
Magnetron
Inventors:
Kaoru Uesawa, Yoshio Abe
Patented Case
View Patent ↗
Granted: Jun 4, 1991
Filed: Apr 14, 1989
Inventors
Kaoru Uesawa
Yoshio Abe
Assignee (at issue)
Matsushita Electronics 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.