Granted Patent
Utility
US 4,312,271 · App. 06/189,717
Delay detonator device
Inventors:
Edward A. Day, Glenn E. Seay, Petry B. Ritter
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Sep 22, 1980
Inventors
Edward A. Day
Glenn E. Seay
Petry B. Ritter
Assignee (at issue)
Systems, Science and Software
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.