Granted Patent
Utility
US 4,875,635 · App. 07/104,814
Programmed ratio mechanical transmission
Inventor:
Edward L. Steltzer
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Oct 2, 1987
Inventor
Edward L. Steltzer
Assignee (at issue)
Digital Equipment 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.