Granted Patent
Utility
US 4,989,486 · App. 07/402,228
System for automatically positioning multiple tool-holding carriages
Inventors:
William R. Miller, Earl A. Sexton, Jr.
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Sep 5, 1989
Inventors
William R. Miller
Earl A. Sexton, Jr.
Assignee (at issue)
Tidland 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.