Granted Patent
Utility
US 4,352,285 · App. 06/073,022
Hydraulic wedge mandrel
Inventors:
Forrest N. LaRue, Lionel H. Wheeler
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Sep 6, 1979
Inventors
Forrest N. LaRue
Lionel H. Wheeler
Assignee (at issue)
Crutcher Resources 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.