Granted Patent
Utility
US 6,821,099 · App. 10/611,180
Rotary pump
Inventors:
Robert A. Wilk, Robert Carlsen
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Jul 1, 2003
Inventors
Robert A. Wilk
Robert Carlsen
Assignee (at issue)
Tilia International, 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.