Granted Patent
Utility
US 4,258,804 · App. 06/035,947
Releasable drill string stabilizer
Inventors:
Vernon T. Richey, Edward L. Moses, Jr.
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: May 4, 1979
Inventors
Vernon T. Richey
Edward L. Moses, Jr.
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.