Granted Patent
Utility
US 6,595,302 · App. 09/932,487
Multi-blade underreamer
Inventors:
Lawrence W. Diamond, Harold E. Payne
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Aug 17, 2001
Inventors
Lawrence W. Diamond
Harold E. Payne
Assignee (at issue)
CDX Gas, LLC
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.