Granted Patent
Utility
US 4,637,301 · App. 06/577,413
Contamination control work station
Inventor:
William Shields
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Feb 6, 1984
Inventor
William Shields
Assignee (at issue)
Environmental Air Control, 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.