Granted Patent
Utility
US 4,721,488 · App. 06/831,696
Apparatus for tensing a shadow mask foil
Inventors:
Lawrence W. Dougherty, James R. Fendley
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Feb 21, 1986
Inventors
Lawrence W. Dougherty
James R. Fendley
Assignee (at issue)
Zenith Electronics LLC
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.