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Joseph Thacher Clarke and his family
Photograph
Joseph Thacher Clarke
Joseph Thacher Clarke and his family
ca. 1905
Joseph Thacher Clarke with sons (Eric and Hans)
Photograph
Joseph Thacher Clarke
Joseph Thacher Clarke with sons (Eric and Hans)
ca. 1905
Patent- Photographic Film Spool
Documentary
Joseph Thacher Clarke
Patent- Photographic Film Spool
October 21, 1902
Patent- Photographic Film Package For Color Photography
Documentary
Joseph Thacher Clarke
Patent- Photographic Film Package For Color Photography
February 28, 1905
Patent- Photographic Negative
Documentary
Joseph Thacher Clarke
Patent- Photographic Negative
March 14, 1911
Patent- Focusing Device
Documentary
Joseph Thacher Clarke
Patent- Focusing Device
March 3, 1914
Patent- Ray filter
Documentary
Joseph Thacher Clarke
Patent- Ray filter
August 24, 1915
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