Granted Patent
Utility
US 4,490,962 · App. 06/522,139
Plastic film wrapper and sealer apparatus
Inventors:
Rudolf R. Weis, Rudolph W. Schutz
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Aug 11, 1983
Inventors
Rudolf R. Weis
Rudolph W. Schutz
Assignee (at issue)
Crown Zellerbach Corporation
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.