Granted Patent
Utility
US 4,479,873 · App. 06/456,671
Light controlled apparatus for moving filter press plates
Inventors:
Lawrence L. Korczykowski, Robert J. Zielinski
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Jan 10, 1983
Inventors
Lawrence L. Korczykowski
Robert J. Zielinski
Assignee (at issue)
The Duriron Company, 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.