Granted Patent
Utility
US 4,884,250 · App. 07/272,945
Accelerometer for blast monitoring
Inventors:
Frank Kitzinger, David Sprott, Michel Menard
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Nov 18, 1988
Inventors
Frank Kitzinger
David Sprott
Michel Menard
Assignee (at issue)
Noranda Inc.
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.