Granted Patent
Utility
US 4,437,525 · App. 06/280,797
Hand held water drilling apparatus
Inventors:
Tom O'Hanlon, Peter L. Madonna, Gearld F. Wallace
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Jul 6, 1981
Inventors
Tom O'Hanlon
Peter L. Madonna
Gearld F. Wallace
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.