Granted Patent
Utility
US 5,087,274 · App. 07/553,869
Bag shaker
Inventors:
James C. Poor, Frederick K. Hoskins, William R. Morcom
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Jul 16, 1990
Inventors
James C. Poor
Frederick K. Hoskins
William R. Morcom
Assignee (at issue)
The Spencer Turbine Company
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.