Granted Patent
Utility
US 4,457,470 · App. 06/365,400
Impulse sprinkler
Inventors:
Harry L. Hauger, Glenn I. Beal
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Apr 5, 1982
Inventors
Harry L. Hauger
Glenn I. Beal
Assignee (at issue)
R. M. Smith, 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.