Granted Patent
Utility
US 4,553,310 · App. 06/584,048
Integrally formed sidepocket mandrel
Inventor:
Francis D. Logan
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Feb 27, 1984
Inventor
Francis D. Logan
Assignee (at issue)
Camco 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.