Granted Patent
Utility
US 4,725,490 · App. 06/859,292
High magnetic permeability composites containing fibers with ferrite fill
Inventor:
Harris A. Goldberg
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: May 5, 1986
Inventor
Harris A. Goldberg
Assignee (at issue)
Hoechst Celanese 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.