Granted Patent
Utility
US 5,215,864 · App. 07/590,152
Method and apparatus for multi-color laser engraving
Inventor:
Peter Laakmann
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Sep 28, 1990
Inventor
Peter Laakmann
Assignee (at issue)
Laser Color Marking, Incorporated
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.