The following references may be useful in overturning
Eastman Kodak's patent no. 5,459,819 October 17, 1995,
"System for custom imprinting a variety of articles with images obtained
from a variety of different sources", application filed April 22, 1994,
or in persuading Eastman Kodak to disclaim it.
- The patent: Search for "5459819" at
patft.uspto.gov/netahtml/srchnum.htm
- GIF87a specification, June 15, 1987, CompuServe Inc. (Image Left
Position and Image Top Position fields within the "Image Descriptor" table).
- TGA specification (Xoffset and Yoffset header fields) The TGA format was
developed in the 1984-1987 time frame.
- TIFF specification (Xposition and Yposition tags). TIFF dates from 1988
or earlier.
- Texture mapping (documentation needed for hardware or software that
did texture mapping prior to the patent)
- ID card maker (documentation needed for one predating the patent)
- If you know of additional references that describe prior art for the
patent, send it to randeg@alum.rpi.edu
This matter is of interest to PNG and MNG Development because PNG supports
an "oFFs" (offset) chunk that can be used to prescribe a predefined location
for the image to be printed or displayed. MNG supports location of images
within the frame via positioning chunks including DEFI and MOVE.
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