Granted Patent
Utility
US 5,899,221 · App. 08/793,769
Fluid pressure regulator
Inventors:
Daniel Holt, Trevor K. Markham
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Oct 17, 1997
Inventors
Daniel Holt
Trevor K. Markham
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.