Granted Patent
Utility
US 6,435,250 · App. 09/797,654
Retractable doorway gate device
Inventors:
Marc D. Pichik, Christy F. Tvrdik
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Mar 5, 2001
Inventors
Marc D. Pichik
Christy F. Tvrdik
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.