Granted Patent
Utility
US 4,906,111 · App. 07/179,272
Auxiliary sealing system
Inventor:
Howard W. Martinie
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Apr 8, 1988
Inventor
Howard W. Martinie
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.