Granted Patent
Utility
US 4,987,927 · App. 07/289,740
Direct-drive valve
Inventor:
Mathew L. Kluczynski
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Dec 27, 1988
Inventor
Mathew L. Kluczynski
Assignee (at issue)
Sterer Engineering and Manufacturing Company
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.