Granted Patent
Utility
US 4,704,509 · App. 06/896,096
Induction apparatus and method for sealing of thermoplastic coated packing material
Inventors:
Anders Hilmersson, Gert Holmstrom, Hans Selberg
Patented Case
View Patent ↗
Granted: Nov 3, 1987
Filed: Aug 13, 1986
Inventors
Anders Hilmersson
Gert Holmstrom
Hans Selberg
Assignee (at issue)
Tetra Pak International AB
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.