Granted Patent
Utility
US 4,733,378 · App. 06/871,329
Active low-profile hydrophone
Inventors:
Richard E. Pearce, Richard A. Marschall, James C. Brown
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Jun 6, 1986
Inventors
Richard E. Pearce
Richard A. Marschall
James C. Brown
Assignee (at issue)
Western Atlas International, 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.