1953 Kodak Patent on Backing Paper - interesting read

BrianShaw

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Also see 2,751,309 from 1956

And 2,959,492 from 1960
 

BrianShaw

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... and from 1939: 2,153,130 and reissue Re. 21,268
 

BrianShaw

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... there are a bunch more that are ink related...
 
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