Granted Patent
Utility
US 4,540,013 · App. 06/541,451
Fire responsive stem retention apparatus
Inventors:
Richard G. Furley, John H. Fowler
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Oct 13, 1983
Inventors
Richard G. Furley
John H. Fowler
Assignee (at issue)
SMITH 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.