Granted Patent
Utility
US 4,545,017 · App. 06/360,715
Well drilling apparatus or the like with position monitoring system
Inventor:
Eugene Richardson
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Mar 22, 1982
Inventor
Eugene Richardson
Assignee (at issue)
Continental Emsco Company
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.