Granted Patent
Utility
US 4,986,183 · App. 07/426,081
Method and apparatus for calibration of electronic delay detonation circuits
Inventors:
Merritt Jacob, Gerald L. Oswald, Glen P. Goffin
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Oct 24, 1989
Inventors
Merritt Jacob
Gerald L. Oswald
Glen P. Goffin
Assignee (at issue)
Atlas Powder 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.