Granted Patent
Utility
US 4,879,784 · App. 07/230,071
Bi-directional squeegee jet wand
Inventor:
William K. Shero
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Aug 9, 1988
Inventor
William K. Shero
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.