Granted Patent
Utility
US 4,457,487 · App. 06/391,193
Flushing device
Inventor:
Carl J. Steigerwald
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Jun 23, 1982
Inventor
Carl J. Steigerwald
Assignee (at issue)
The Kendall Company LP
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.