Granted Patent
Utility
US 5,791,073 · App. 08/748,018
Vacuum excavation system
Inventors:
Michael G. Palmer, Richard M. Saroney
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: Nov 12, 1996
Inventors
Michael G. Palmer
Richard M. Saroney
Assignee (at issue)
Filtration Manufacturing, 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.