Stephen R. Sofen

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Cambridge, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Thermographic and photothermographic imaging materials
- Patent number 5,328,799
- Issue date Jul 12, 1994
- Polaroid Corporation
- James R. Freedman
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Silver diffusion transfer film unit with noble metal compound as st...
- Patent number 4,463,082
- Issue date Jul 31, 1984
- Polaroid Corporation
- John H. Ferguson
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY