Granted Patent
Utility
US 4,947,674 · App. 07/241,699
Limit switch calibration system
Inventors:
Kevin L. Strain, Jack A. Huizenga
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Sep 7, 1988
Inventors
Kevin L. Strain
Jack A. Huizenga
Assignee (at issue)
Commonwealth Edison Company
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.