Granted Patent
Utility
US 6,497,230 · App. 09/545,682
Air port damper
Inventors:
Daniel R. Higgins, Eugene Sullivan, Robert B. Hill
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Apr 7, 2000
Inventors
Daniel R. Higgins
Eugene Sullivan
Robert B. Hill
Assignee (at issue)
Anthony-Ross Company
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.