Granted Patent
Utility
US 4,650,462 · App. 06/760,171
Irrigation system
Inventors:
Allen H. DeSatnick, Herbert D. Marcus
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Jul 29, 1985
Inventors
Allen H. DeSatnick
Herbert D. Marcus
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.