Granted Patent
Utility
US 4,388,618 · App. 06/223,041
Battery state of charge indicator operating on bidirectional integrations of terminal voltage
Inventor:
Eugene P. Finger
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Jan 7, 1981
Inventor
Eugene P. Finger
Assignee (at issue)
Curtis Instruments, 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.