Granted Patent
Utility
US 5,670,925 · App. 08/711,839
Bobbin, bobbin and core assembly, and inductor coil assembly for electronic ballast
Inventor:
Michael John Gibbs
Patented Case
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Granted: Sep 23, 1997
Filed: Sep 10, 1996
Inventor
Michael John Gibbs
Assignee (at issue)
OSRAM SYLVANIA 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.