Granted Patent
Utility
US 4,774,449 · App. 06/835,159
Transformerless battery charger in combination with a battery, and method of charging a battery
Inventor:
Robin Elkins
Patented Case
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Granted: Sep 27, 1988
Filed: Mar 3, 1986
Inventor
Robin Elkins
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.