Granted Patent
Utility
US 5,772,128 · App. 08/651,194
System for acoustically detecting and/or removing jams of flowable material in a chute, and air hammer for performing the removal
Inventor:
David J. McRae
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: May 17, 1996
Inventor
David J. McRae
Assignee (at issue)
CSI Technology Co., Ltd.
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.