Granted Patent
Utility
US 5,114,070 · App. 07/610,497
Pneumatic direct digital controller
Inventors:
Philip C. Lilja, Paul Ehrlich, Allenn E. Martin
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Nov 6, 1990
Inventors
Philip C. Lilja
Paul Ehrlich
Allenn E. Martin
Assignee (at issue)
American Standard 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.