Granted Patent
Utility
US 4,505,960 · App. 06/522,872
Unitary shock-absorbing polymeric pad for artificial turf
Inventor:
James W. Leffingwell
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Aug 12, 1983
Inventor
James W. Leffingwell
Assignee (at issue)
Monsanto 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.