Granted Patent
Utility
US 6,457,658 · App. 09/754,075
Two-level nozzles with integrated or built-in filters and method
Inventors:
Dharapuram N. Srinath, Eric Koehler
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Jan 5, 2001
Inventors
Dharapuram N. Srinath
Eric Koehler
Assignee (at issue)
Bowles Fluidics Corporation
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.