Granted Patent
Utility
US 6,749,374 · App. 09/618,695
Flow development chamber for creating a vortex flow and a laminar flow
Inventors:
Darin L. Lane, Walter D. Prince
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Jul 18, 2000
Inventors
Darin L. Lane
Walter D. Prince
Assignee (at issue)
Eco 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.