Granted Patent
Utility
US 5,929,368 · App. 08/762,262
Hybrid electronic detonator delay circuit assembly
Inventors:
David W. Ewick, Paul N. Marshall, Kenneth A. Rode, Thomas C. Tseka, Brendan Michael Walsh
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Dec 9, 1996
Inventors
David W. Ewick
Paul N. Marshall
Kenneth A. Rode
Thomas C. Tseka
Brendan Michael Walsh
Assignee (at issue)
The Ensign-Bickford 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.