RD

Ralph Kingsley Blake, deceased

EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
🗺 New Jersey: #41,174 of 69,400 inventorsTop 60%
Overall (All Time): #4,115,461 of 4,157,543Top 100%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4211837 Photographic silver halide element with opaque backing layer James G. Morgan, David W. Woodward 1980-07-08