Granted Patent
Utility
US 4,839,721 · App. 06/645,093
Method of and apparatus for transforming color image data on the basis of an isotropic and uniform colorimetric space
Inventors:
Munib Abdulwahab, James L. Burkhardt, John McCann
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Aug 28, 1984
Inventors
Munib Abdulwahab
James L. Burkhardt
John McCann
Assignee (at issue)
Polaroid 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.