Granted Patent
Utility
US 4,225,357 · App. 06/019,152
Method of producing and distributing a pervious concrete product
Inventor:
Harry Hodson
Patented Case
View Patent ↗
Granted: Sep 30, 1980
Filed: Mar 9, 1979
Inventor
Harry Hodson
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.