Granted Patent
Utility
US 4,674,821 · App. 06/834,352
Electron tube base
Inventor:
Myron H. Wardell, Jr.
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Feb 28, 1986
Inventor
Myron H. Wardell, Jr.
Assignee (at issue)
RCA 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.