Granted Patent
Utility
US 5,012,720 · App. 07/400,291
Plasma projectile accelerator with valve means for preventing the backward flow of plasma in passage through which projectile is accelerated
Inventor:
Derek A. Tidman
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Aug 29, 1989
Inventor
Derek A. Tidman
Assignee (at issue)
GT-Devices
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.