Granted Patent
Utility
US 5,732,738 · App. 08/668,574
Valve trim
Inventor:
Gary E. Graham
Patented Case
View Patent ↗
Granted: Mar 31, 1998
Filed: Jun 20, 1996
Inventor
Gary E. Graham
Assignee (at issue)
BW/IP International of Pennsylvania, 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.