Granted Patent
Utility
US 4,694,722 · App. 06/763,044
Apparatus for scoring and cutting wallboard and the like
Inventors:
Ronald T. Collier, Robert E. Thompson
Patented Case
View Patent ↗
Granted: Sep 22, 1987
Filed: Aug 6, 1985
Inventors
Ronald T. Collier
Robert E. Thompson
Assignee (at issue)
Cardinal Industries, 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.