Granted Patent
Utility
US 4,604,767 · App. 06/695,982
Wringer mop
Inventors:
Richard P. Burkhart, Edward C. Gemperle
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Jan 29, 1985
Inventors
Richard P. Burkhart
Edward C. Gemperle
Assignee (at issue)
The Drackett 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.