Granted Patent
Utility
US 4,333,527 · App. 06/148,928
Side pocket mandrel and method of construction
Inventors:
Robert Scott Higgins, David T. Merritt
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: May 12, 1980
Inventors
Robert Scott Higgins
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.