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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Qualitz; Marion
Address:
Hilden, DE
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
4379721 Pressure sensitive recording materials April 12, 1983
The present invention relates to a pressure-sensitive recording material ing improved storability, lightfastness and heat resistance, which comprises a unit containing a dye precursor or its solution and a unit containing a dye acceptor material which is capable of color formation by










 
 
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