Granted Patent
Utility
US 4,664,993 · App. 06/295,266
Laminar batteries and methods of making the same
Inventors:
John I. Sturgis, Robert G. Keene, deceased
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Aug 24, 1981
Inventors
John I. Sturgis
Robert G. Keene, deceased
Assignee (at issue)
Polaroid 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.