Granted Patent
Utility
US 5,209,768 · App. 07/715,607
Method of improving sod growth
Inventor:
John Hughes
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Jun 14, 1991
Inventor
John Hughes
Assignee (at issue)
American Colloid 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.