Granted Patent
Utility
US 4,624,194 · App. 06/641,967
Probe for breaking and injecting soil
Inventor:
Eugen Zinck
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Aug 2, 1984
Inventor
Eugen Zinck
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.