Granted Patent
Utility
US 5,667,231 · App. 08/528,323
Trailer
Inventors:
Dale J. Dierks, A. Dean Oehlerking, Ray E. Paradis, Harry E. Voelzke
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Sep 14, 1995
Inventors
Dale J. Dierks
A. Dean Oehlerking
Ray E. Paradis
Harry E. Voelzke
Assignee (at issue)
DAKOTA MANUFACTURING COMPANY, 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.