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US Patent: 2,397,742
Automatic Operation of Diaphragms and Shutters of Portrait Cameras
Patentee: William S. Kals (exact or similar names) - Vancouver, BC, Canada USPTO Classifications: 396/461 Tool Categories: photographic apparatus : cameras : camera accessories Assignees: Graflex, Inc. - Rochester, Monroe County, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 31, 1944 Granted: Apr. 02, 1946 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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