Granted Patent
Utility
US 4,459,614 · App. 06/334,348
Rotation-free electrical focussing circuit for television image tubes
Inventor:
James R. Holzgrafe
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Dec 24, 1981
Inventor
James R. Holzgrafe
Assignee (at issue)
Ampex 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.