Granted Patent
Utility
US 5,559,725 · App. 08/319,961
Automatic depth control for trencher
Inventors:
Edward G. Nielson, Timothy S. DeBruine, Daniel Modzeleski, Ross C. Stoepker
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Oct 7, 1994
Inventors
Edward G. Nielson
Timothy S. DeBruine
Daniel Modzeleski
Ross C. Stoepker
Assignee (at issue)
Laser Alignment, 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.