US3558318A
1968-07-18
Light-sensitive diazotype material which comprise aryl-substituted acylacetonitriles or ester or amide derivatives of said aryl-substituted acylacetonitriles as coupling components
GB1179564A
1967-01-25
Azographic Reproduction Article and Method
US3359653A
1965-09-08
Trigonometric teaching device
US3479183A
1965-06-16
Negative-working diazosulfonate reproduction process
US3339288A
1964-12-21
Projection game device
US3264936A
1964-06-17
Overhead projection stage for transparencies
US3387977A
1964-03-31
Diazotype layer containing acetoacetamido coupling components
US3264767A
1964-01-29
Pin registration system of producing slide transparencies for overhead projection
US3203803A
1964-01-20
Light-sensitive diazo hexafluoro-phosphate compositions
US3217625A
1963-07-05
High resolution reproduction apparatus
GB947980A
1962-06-29
Method of making polarised slides
US3089802A
1960-02-01
Method of making polarized slides
GB881029A
1960-01-29
Photographic printing apparatus
GB884692A
1960-01-29
Pin registration system of producing slide transparencies for overhead projection
GB855113A
1959-03-23
Dry type developing tank apparatus
GB849989A
1958-11-10
Photographic printing apparatus
US2933997A
1958-05-20
Dry type printer-developer apparatus
US2986081A
1957-11-13
Photographic printing apparatus
US2839978A
1954-05-18
Slip screen structure for dry-type developing machines
CA598785A
None
Dry type developing tank apparatus
