Granted Patent
Utility
US 5,299,172 · App. 08/013,052
Method for adjusting crystal hydrophone output
Inventors:
Algernon S. Badger, Gary Craig
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Feb 3, 1993
Inventors
Algernon S. Badger
Gary Craig
Assignee (at issue)
Halliburton Geophysical Services, 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.