Granted Patent
Utility
US 4,928,571 · App. 07/403,275
Liquid propellant gun
Inventor:
Melvin J. Bulman
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Aug 10, 1989
Inventor
Melvin J. Bulman
Assignee (at issue)
General Electric Company
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.