Granted Patent
Utility
US 5,251,480 · App. 07/892,291
Frost-proof drive shaft for water meter
Inventors:
Charles P. Brunson, IV, Thierry W. Swinson
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Jun 2, 1992
Inventors
Charles P. Brunson, IV
Thierry W. Swinson
Assignee (at issue)
Schlumberger Industires, S.A.
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.