Granted Patent
Utility
US 5,454,756 · App. 08/188,091
Clean room ventilation system
Inventor:
Craig S. Ludwig
Patented Case
View Patent ↗
Granted: Oct 3, 1995
Filed: Jan 28, 1994
Inventor
Craig S. Ludwig
Assignee (at issue)
PACE, 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.