Granted Patent
Utility
US 4,429,432 · App. 06/266,798
Sanitizer attachment for a mobile floor cleaner
Inventors:
William M. Copeland, Roland A. Blomgren, Robert L. Shallenberg
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: May 26, 1981
Inventors
William M. Copeland
Roland A. Blomgren
Robert L. Shallenberg
Assignee (at issue)
ServiceMaster Industries, 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.