Granted Patent
Utility
US 5,522,271 · App. 08/505,825
Tool and method for soil sampling
Inventors:
David E. Turriff, Lloyd E. Jacobs, Nils K. Melberg, Christopher A. Reitmeyer
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Jul 21, 1995
Inventors
David E. Turriff
Lloyd E. Jacobs
Nils K. Melberg
Christopher A. Reitmeyer
Assignee (at issue)
En Chem, Inc.
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.