Granted Patent
Utility
US 4,757,648 · App. 06/892,438
Rocker barrel configuration
Inventors:
James H. Carpenter, Donald M. Barnhart
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Aug 4, 1986
Inventors
James H. Carpenter
Donald M. Barnhart
Assignee (at issue)
Pangborn 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.