Granted Patent
Utility
US 4,416,170 · App. 06/479,106
Method of producing a steel caul
Inventors:
Donald B. Gibson, Gerald F. Laughinghouse
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Mar 28, 1983
Inventors
Donald B. Gibson
Gerald F. Laughinghouse
Assignee (at issue)
Champion International Corporation Limited
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.