Granted Patent
Utility
US 4,372,239 · App. 06/126,782
Undersea weapon with hydropulse system and periodical seawater admission
Inventors:
Allen C. Hagelberg, Clark E. Allardt, Walter A. Lobitz, Robert Thornburg, George F. Zimmerman, Gary L. Letterman, John W. Helbron
Patented Case
View Patent ↗
Granted: Feb 8, 1983
Filed: Mar 3, 1980
Inventors
Allen C. Hagelberg
Clark E. Allardt
Walter A. Lobitz
Robert Thornburg
George F. Zimmerman
Gary L. Letterman
John W. Helbron
Assignee (at issue)
General Dynamics Corp., Pomona Division
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.