Granted Patent
Utility
US 4,157,874 · App. 05/895,228
Dye marking device
Inventor:
David Durand
Patented Case
View Patent ↗
Granted: Jun 12, 1979
Filed: Apr 10, 1978
Inventor
David Durand
Assignee (at issue)
Freeman Transfer Printing Company, 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.