Granted Patent
Utility
US 4,807,397 · App. 07/105,642
Compression honeycomb door seal
Inventor:
Daniel C. Doan
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Oct 5, 1987
Inventor
Daniel C. Doan
Assignee (at issue)
RJF International Corporation
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.