Granted Patent
Utility
US 4,650,508 · App. 06/798,047
Method and apparatus for changing bushings
Inventors:
Charles S. Dunn, Stephen Seng, Michael D. Hickman
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Nov 14, 1985
Inventors
Charles S. Dunn
Stephen Seng
Michael D. Hickman
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.