Granted Patent
Utility
US 4,794,708 · App. 07/154,704
Trenching machine boom assembly
Inventors:
Philip W. Schroeder, Marvin L. Morris, Stephen A. Youngers
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Feb 11, 1988
Inventors
Philip W. Schroeder
Marvin L. Morris
Stephen A. Youngers
Assignee (at issue)
J. I. Case 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.