Classifications: Documentary

Classifications: Documentary
433 to 456 of 1,338
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Image Not Available
Documentary
William A. Riddell
Patnet- Photographic Shutter Setting Mechanism
September 15, 1931
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Retarding Mechanism
September 15, 1931
Image Not Available
Documentary
William A. Riddell
Patent- Exposure Guide For Camera Shutters
March 10, 1931
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Construction
January 6, 1931
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Blade Actuating Mechanism
April 8, 1930
Image Not Available
Documentary
William A. Riddell
Patent- Intermittent Feed Mechanism
June 11, 1929
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
February 5, 1929
Image Not Available
Documentary
William A. Riddell
Patent- Shutter Casing
September 4, 1928
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
March 20, 1928
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
October 18, 1927
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
May 24, 1927
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Casing
February 8, 1927
Image Not Available
Documentary
William A. Riddell
Patent- Case for photographic shutters
December 28, 1926
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
November 9, 1926
Image Not Available
Documentary
William A. Riddell
Patent- Shutter For Panoramic Camera
February 9, 1926
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
May 26, 1925
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
April 1, 1924
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
January 22, 1924
Image Not Available
Documentary
William A. Riddell
Patent- Finder
December 5, 1922
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Speed Testing Machine
October 10, 1922
Image Not Available
Documentary
William A. Riddell
Patent- Film Winding Mechanism For Cameras
July 11, 1922
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
June 1, 1920
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Camera
April 1, 1919
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Lens Carriage
February 25, 1919
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