Granted Patent
Utility
US 4,380,044 · App. 06/193,638
D.C. to d.c. converter with plural feedback loops
Inventor:
Andrew F. Parr
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Oct 3, 1980
Inventor
Andrew F. Parr
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.