Granted Patent
Utility
US 4,538,971 · App. 06/514,491
Assembly of tank lid and fan means of a wet/dry vacuum
Inventors:
Jonathan Miller, Rudolph W. Wacek, Robert C. Berfield, Ronald F. Meland, Robert L. Crevling, Jr., Lonnie B. Lawson, Jr.
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Jul 18, 1983
Inventors
Jonathan Miller
Rudolph W. Wacek
Robert C. Berfield
Ronald F. Meland
Robert L. Crevling, Jr.
Lonnie B. Lawson, Jr.
Assignee (at issue)
SHOP VAC CORPORATION
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.