Objects

Objects
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Image Not Available
Documentary
John Alexander Robertson
Patent- Photographic Camera
1916/08/22
1998.1379.0001
Image Not Available
Documentary
William A. Riddell
Patnet- Photographic Shutter Setting Mechanism
1931/09/15
1998.1355.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Retarding Mechanism
1931/09/15
1998.1354.0001
Image Not Available
Documentary
William A. Riddell
Patent- Exposure Guide For Camera Shutters
1931/03/10
1998.1353.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Construction
1931/01/06
1998.1352.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Blade Actuating Mechanism
1930/04/08
1998.1351.0001
Image Not Available
Documentary
William A. Riddell
Patent- Intermittent Feed Mechanism
1929/06/11
1998.1350.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1929/02/05
1998.1349.0001
Image Not Available
Documentary
William A. Riddell
Patent- Shutter Casing
1928/09/04
1998.1348.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1928/03/20
1998.1347.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1927/10/18
1998.1346.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1927/05/24
1998.1345.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Casing
1927/02/08
1998.1344.0001
Image Not Available
Documentary
William A. Riddell
Patent- Case For Photographic Shutters
1926/12/28
1998.1343.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1926/11/09
1998.1342.0001
Image Not Available
Documentary
William A. Riddell
Patent- Shutter For Panoramic Camera
1926/02/09
1998.1341.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1925/05/26
1998.1340.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1924/04/01
1998.1339.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1924/01/22
1998.1338.0001
Image Not Available
Documentary
William A. Riddell
Patent- Finder
1922/12/05
1998.1337.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter Speed Testing Machine
1922/10/10
1998.1336.0001
Image Not Available
Documentary
William A. Riddell
Patent- Film Winding Mechanism For Cameras
1922/07/11
1998.1335.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Shutter
1920/06/01
1998.1334.0001
Image Not Available
Documentary
William A. Riddell
Patent- Photographic Camera
1919/04/01
1998.1333.0001
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