Granted Patent
Utility
US 4,497,441 · App. 06/488,203
Pulsating sprinkler
Inventor:
Ho Chow
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Apr 25, 1983
Inventor
Ho Chow
Assignee (at issue)
Melnor Industries, 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.