Granted Patent
Utility
US 4,694,436 · App. 06/615,086
Noise-attenuating streamer-cable bulkhead
Inventor:
Valery A. Gelfand
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: May 29, 1984
Inventor
Valery A. Gelfand
Assignee (at issue)
Western Geophysical Company of America
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.