Granted Patent
Utility
US 4,421,150 · App. 06/282,454
Waterproof bag device for articles
Inventor:
William E. Masters
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Jul 13, 1981
Inventor
William E. Masters
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.