Granted Patent
Utility
US 5,010,295 · App. 07/365,878
Ball screw supported Z stage
Inventor:
William Lindsay
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Jun 14, 1989
Inventor
William Lindsay
Assignee (at issue)
Federal Signal 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.