Granted Patent
Utility
US 4,380,446 · App. 06/186,697
Side sealing mechanism for a packaging machine
Inventors:
J. Douglas Dickson, J. David Sweeney, Ronald K. Coleman
Patented Case
View Patent ↗
Granted: Apr 19, 1983
Filed: Sep 12, 1980
Inventors
J. Douglas Dickson
J. David Sweeney
Ronald K. Coleman
Assignee (at issue)
Rexham Holdings 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.