Granted Patent
Utility
US 5,042,612 · App. 07/538,765
Bulk material load vehicle access system
Inventors:
Ronald W. Bennett, Bruce A. Pech
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Jun 15, 1990
Inventors
Ronald W. Bennett
Bruce A. Pech
Assignee (at issue)
Aluminum Ladder 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.