Granted Patent
Utility
US 4,829,418 · App. 07/042,449
Apparatus and method for controlling a hydraulic excavator
Inventors:
Edward G. Nielsen, Timothy E. Steenwyk
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Apr 24, 1987
Inventors
Edward G. Nielsen
Timothy E. Steenwyk
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.