Granted Patent
Utility
US 5,522,421 · App. 08/376,767
Fluid pressure regulator
Inventors:
Daniel Holt, Trevor K. Markham
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Jan 23, 1995
Inventors
Daniel Holt
Trevor K. Markham
Assignee (at issue)
Daniel A. Holt
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.