Granted Patent
Utility
US 5,222,521 · App. 07/879,895
Hydraulic valve
Inventor:
Markus C. Kihlberg
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: May 8, 1992
Inventor
Markus C. Kihlberg
Assignee (at issue)
Moog Controls Limited
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.