Granted Patent
Utility
US 5,538,029 · App. 08/422,817
Method for adjusting valve sealing engagement
Inventor:
Edward G. Holtgraver
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Apr 17, 1995
Inventor
Edward G. Holtgraver
Assignee (at issue)
Henry Pratt Company
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.