Granted Patent
Utility
US 4,428,815 · App. 06/489,448
Vacuum-type article holder and methods of supportively retaining articles
Inventors:
Walter W. Powell, Gary A. Seifert
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Apr 28, 1983
Inventors
Walter W. Powell
Gary A. Seifert
Assignee (at issue)
Western Electric Company, 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.