Granted Patent
Utility
US 4,281,801 · App. 06/091,358
Granulator with false bottom collection chamber
Inventors:
Frank Parker, Leslie M. Parker
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Nov 5, 1979
Inventors
Frank Parker
Leslie M. Parker
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.