Granted Patent
Utility
US 5,628,367 · App. 08/335,645
Temperature sensitive sprinkler head with improved spring
Inventors:
Perin E. Truax, James G. Retzloff
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Nov 8, 1994
Inventors
Perin E. Truax
James G. Retzloff
Assignee (at issue)
Viking Group, 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.