Granted Patent
Utility
US 5,071,504 · App. 07/421,241
Double sided laminating machine
Inventor:
Karl Singer
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Oct 13, 1989
Inventor
Karl Singer
Assignee (at issue)
D&K Custom Machine Design, Inc.
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.