Granted Patent
Utility
US 4,953,548 · App. 07/266,666
Laser resistant ventilating device with locking ferrule
Inventors:
Philip V. Stoddard, Craig J. Bell, Donald R. Schneider
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Nov 3, 1988
Inventors
Philip V. Stoddard
Craig J. Bell
Donald R. Schneider
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.