Granted Patent
Utility
US 5,517,821 · App. 08/421,201
Pneumatic control circuit for applying constant force
Inventors:
Robert O. Braesch, Peter L. Hong, Thomas A. Mefferd, Michael D. Olson
Patented Case
View Patent ↗
Granted: May 21, 1996
Filed: Apr 13, 1995
Inventors
Robert O. Braesch
Peter L. Hong
Thomas A. Mefferd
Michael D. Olson
Assignee (at issue)
Columbus McKinnon 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.