Granted Patent
Utility
US 4,834,087 · App. 07/009,747
Laser resistant ventilating device
Inventors:
Patrick W. Coleman, Craig J. Bell, Frank Cavataio
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Feb 2, 1987
Inventors
Patrick W. Coleman
Craig J. Bell
Frank Cavataio
Assignee (at issue)
MALLINCKRODT 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.