Granted Patent
Utility
US 4,957,035 · App. 07/337,047
Electrothermal acceleration device
Inventors:
Armin Eskam, Gunter Frye, Herbert Krumm
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Apr 12, 1989
Inventors
Armin Eskam
Gunter Frye
Herbert Krumm
Assignee (at issue)
Rheinmetall GmbH
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.