Granted Patent
Utility
US 5,868,528 · App. 08/831,090
Clean air bulk material handling method and system
Inventors:
John W. Howanski, Clifford B. Richardson
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Apr 1, 1997
Inventors
John W. Howanski
Clifford B. Richardson
Assignee (at issue)
Hendrix Wire & Cable, 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.