Granted Patent
Utility
US 5,536,939 · App. 08/320,474
Miniaturized mass filter
Inventors:
Carl B. Freidhoff, Robert M. Young
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Oct 7, 1994
Inventors
Carl B. Freidhoff
Robert M. Young
Assignee (at issue)
NORTHROP GRUMMAN 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.