Alfred Hengst: Difference between revisions

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=== E. Leitz Photographic Patents by Alfred Hengst ===
=== E. Leitz Photographic Patents by Alfred Hengst ===


*1975 APR 28 - BINOCULARS WITH DOUBLE BRIDGE AND RESILIENT BIASING
*1978 APR 17 - ILLUMINATION SYSTEM FOR PHOTOGRAPHIC ENLARGERS
*1978 APR 17 - ILLUMINATION SYSTEM FOR PHOTOGRAPHIC ENLARGERS
*1980 MAY 20 - BINOCULAR TELESCOPE WITH INTERNAL FOCUSING
*1980 MAY 20 - BINOCULAR TELESCOPE WITH INTERNAL FOCUSING

Revision as of 22:52, 2 March 2012

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E. Leitz Photographic Patents by Alfred Hengst