Granted Patent
Utility
US 5,611,105 · App. 08/372,512
Torsionally flexible frame structure
Inventors:
Michael L. Blehert, Robert A. Geyer
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Jan 13, 1995
Inventors
Michael L. Blehert
Robert A. Geyer
Assignee (at issue)
TENNANT 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.