Granted Patent
Utility
US 6,003,602 · App. 08/924,299
Tree bore protector
Inventor:
Robert Lee Wilkins
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Sep 5, 1997
Inventor
Robert Lee Wilkins
Assignee (at issue)
Kraerner Oilfield Products
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.