Granted Patent
Utility
US 4,492,362 · App. 06/444,565
Valve seat with trapped O-ring
Inventors:
Frank Garcia, Jr., David L. Brown
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Nov 26, 1982
Inventors
Frank Garcia, Jr.
David L. Brown
Assignee (at issue)
Vetco Offshore, 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.