Granted Patent
Utility
US 4,448,430 · App. 06/420,529
Hollow reinforced sealing strips
Inventor:
Robert G. Bright
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Sep 21, 1982
Inventor
Robert G. Bright
Assignee (at issue)
Draftex Development A.G.
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.