Granted Patent
Utility
US 4,977,963 · App. 07/335,749
Partially concealed fast response sprinkler head
Inventor:
John R. Simons
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Apr 10, 1989
Inventor
John R. Simons
Assignee (at issue)
Star Sprinkler Corporation
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.