Granted Patent
Utility
US 6,715,561 · App. 09/896,329
Vacuum dry sprinkler system containing a sprinkler head with expulsion assembly
Inventor:
Scott T. Franson
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Jun 29, 2001
Inventor
Scott T. Franson
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.