Georg Knetsch — Lens Patent Author | Surface & Stop

Georg Knetsch4 related patents across 4 interactive lens diagrams.
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Ernst Leitz GmbH (4)
Ernst Leitz GmbH(4)US 2,995,980↗1961Assignee: Ernst Leitz GmbH
Inventors: Otto Zimmermann, Georg Knetsch
Sole exampleLEICA ELMARIT 90mm f/2.8— 5 ELEMENTS / 3 GROUPS, f ≈ 90.1 mm
US 3,536,379↗1970Assignee: Ernst Leitz GmbH
Inventors: Georg Knetsch
Sole exampleLEICA TELYT-S 800mm f/6.3— 3 ELEMENTS / 1 CEMENTED GROUP, 800mm f/6.3 MARKETED
DE 2 222 892 A1↗1973Assignee: Ernst Leitz GmbH
Inventors: Georg Knetsch, Hermann Desch, Heinz Marquardt, Walter Watz
Example 3LEICA SUMMICRON-C 40mm f/2— 6 ELEMENTS / 4 GROUPS, f = 39.9987 mm (DESIGN)
DE 2 246 966 A1↗1974Assignee: Ernst Leitz GmbH
Inventors: Georg Knetsch, Walter Watz
Claim 3LEICA MACRO-ELMAR-M 90mm f/4— 4 ELEMENTS / 4 GROUPS, f = 89.958 mm (modeled)