Granted Patent
Utility
US 5,349,892 · App. 07/788,408
Propellant stick kerfing apparatus and method
Inventors:
Michael Taylor, Steven R. Chambers
Patented Case
View Patent ↗
Granted: Sep 27, 1994
Filed: Nov 6, 1991
Inventors
Michael Taylor
Steven R. Chambers
Assignee (at issue)
Alliant Techsystems 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.