Granted Patent
Utility
US 4,340,653 · App. 06/249,018
Galvanic dry cell employing a tapered cathode bobbin
Inventor:
Richard Adams
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Mar 30, 1981
Inventor
Richard Adams
Assignee (at issue)
Union Carbide 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.