Granted Patent
Utility
US 6,556,144 · App. 09/544,969
Method and apparatus for data communication with an underground instrument package
Inventors:
George F. Roberts, Edward Fraser, Fred Earnest
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Apr 7, 2000
Inventors
George F. Roberts
Edward Fraser
Fred Earnest
Assignee (at issue)
Reuter-Stokes, Inc. (General Electric 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.