Granted Patent
Utility
US 4,172,249 · App. 05/814,291
Resistive electrical components
Inventor:
Joseph Szwarc
Patented Case
View Patent ↗
Granted: Oct 23, 1979
Filed: Jul 11, 1977
Inventor
Joseph Szwarc
Assignee (at issue)
VISHAY INTERTECHNOLOGY, INC.
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.