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| All Patents in class 356/8 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,178,857 | Nov. 07, 1939 | E.S. Hineline | Range and View Finder | camera view finders | |
| 2,717,543 | Sep. 13, 1955 | C.B. McCathron | Combined Range and View Finder for Cameras | camera range finders | |