Granted Patent
Utility
US 4,667,364 · App. 06/767,876
Floor-cleaning machine
Inventor:
Hermann Meili
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Aug 21, 1985
Inventor
Hermann Meili
Assignee (at issue)
Internationale Otrool Maatschappij Octropa B.V.
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.