Granted Patent
Utility
US 5,123,141 · App. 07/478,209
Cleaning tool having airflow directing manifold for a vacuum cleaner system
Inventors:
Roy O. Erickson, Jr., Anthony Alexander, John J. Alberts, III
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: Feb 9, 1990
Inventors
Roy O. Erickson, Jr.
Anthony Alexander
John J. Alberts, III
Assignee (at issue)
REXAIR LLC
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.