Granted Patent
Utility
US 4,557,308 · App. 06/621,713
Tire valve and low pressure indicator
Inventor:
Harold A. Kuypers
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Jun 18, 1984
Inventor
Harold A. Kuypers
Assignee (at issue)
Scovil 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.