Granted Patent
Utility
US 4,726,425 · App. 07/087,990
Combination landing unit and seal assembly
Inventor:
Sidney K. Smith, Jr.
Patented Case
View Patent ↗
Granted: Feb 23, 1988
Filed: Aug 17, 1987
Inventor
Sidney K. Smith, Jr.
Assignee (at issue)
Hughes Tool Company LLC
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.