Granted Patent
Utility
US 4,673,036 · App. 06/829,088
Side pocket mandrel
Inventor:
David T. Merritt
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Feb 13, 1986
Inventor
David T. Merritt
Assignee (at issue)
Otis Engineering Corporation
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.