Granted Patent
Utility
US 4,258,795 · App. 06/018,680
On-off sprinkler head having an offset drive motor
Inventor:
Arne Hansen
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Mar 8, 1979
Inventor
Arne Hansen
Assignee (at issue)
CENTRAL 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.