Granted Patent
Utility
US 4,644,819 · App. 06/777,206
High-low speed drive system for multiple spindle machines
Inventor:
Martin J. Zugel
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Sep 18, 1985
Inventor
Martin J. Zugel
Assignee (at issue)
LEGGETT & PLATT, 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.