Granted Patent
Utility
US 4,811,311 · App. 07/107,163
Seismic detector assembly having polarized terminals
Inventors:
James C. Woodall, S. E. Haggard
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Oct 13, 1987
Inventors
James C. Woodall
S. E. Haggard
Assignee (at issue)
Mark Products, 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.