Granted Patent
Utility
US 5,628,411 · App. 08/347,957
Valve devices for use in sorting apparatus ejectors
Inventors:
Stewart Mills, Kenneth C. Henderson
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Dec 1, 1994
Inventors
Stewart Mills
Kenneth C. Henderson
Assignee (at issue)
Sortex Limited
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.