Granted Patent
Utility
US 6,761,959 · App. 09/351,102
Diffractive surfaces with color shifting backgrounds
Inventors:
Richard L. Bonkowski, Patrick K. Higgins, Charles T. Markantes, Roger W. Phillips
Patented Case
View Patent ↗
Granted: Jul 13, 2004
Filed: Jul 8, 1999
Inventors
Richard L. Bonkowski
Patrick K. Higgins
Charles T. Markantes
Roger W. Phillips
Assignee (at issue)
Flex Products, 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.