Granted Patent
Utility
US 4,669,783 · App. 06/813,823
Process and apparatus for fragmenting rock and like material using explosion-free high pressure shock waves
Inventor:
Jack J. Kolle
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Dec 27, 1985
Inventor
Jack J. Kolle
Assignee (at issue)
Flow Industries, Ltd.
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.