Granted Patent
Utility
US 5,090,640 · App. 07/505,303
Aircraft door operating mechanism
Inventor:
Donald J. Fessett
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Apr 5, 1990
Inventor
Donald J. Fessett
Assignee (at issue)
Lucas Western 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.