Granted Patent
Utility
US 6,170,119 · App. 09/322,988
Method and apparatus for reducing the size of elongate particulate material in a vacuum cleaner head
Inventors:
Wayne Ernest Conrad, Scott Hamilton
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Jun 1, 1999
Inventors
Wayne Ernest Conrad
Scott Hamilton
Assignee (at issue)
Fantom Technologies 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.