Granted Patent
Utility
US 5,401,919 · App. 08/248,626
Removable piston bore liner for hydraulically actuated seismic vibrator
Inventors:
John Crowell, James Teske
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: May 24, 1994
Inventors
John Crowell
James Teske
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.