Granted Patent
Utility
US 4,306,400 · App. 06/119,310
Packaging machine with continuous motion top sealer
Inventors:
Ronald K. Coleman, Charles A. Burton
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Feb 7, 1980
Inventors
Ronald K. Coleman
Charles A. Burton
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.