Granted Patent
Utility
US 4,570,899 · App. 06/672,830
Adjustable slow closing valve assembly
Inventor:
Paul Kingham
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Nov 19, 1984
Inventor
Paul Kingham
Assignee (at issue)
Household Manufacturing, Inc.
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.