Granted Patent
Utility
US 4,819,560 · App. 07/053,150
Detonator firing element
Inventors:
Vivian Edward Patz, Stafford A. Smithies
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: May 21, 1987
Inventors
Vivian Edward Patz
Stafford A. Smithies
Assignee (at issue)
Detonix Close Corporation
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.