Granted Patent
Utility
US 4,493,586 · App. 06/348,781
Rip-rap laying machine and method of laying rip-rap
Inventors:
Lee W. Miles, Samuel W. Chambers, Mathias F. Rice
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Feb 16, 1982
Inventors
Lee W. Miles
Samuel W. Chambers
Mathias F. Rice
Assignee (at issue)
Morrison-Knudsen Corporation
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.