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GB132846A
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Improved Manufacture of Photographic Plates and Pictures
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GB128781A
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Improved Process of Producing Coloured Photographic Pictures and Apparatus therefor.
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US1256981A
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Method of producing photographic films of varying porousness.
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GB103890A
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Improvements in or relating to Photographic Processes.
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GB191325419A
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Improvements in or relating to Photographic Emulsions.
|
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GB191207480A
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Improved Manufacture of Multi-colour Screens particularly adapted for use in Photography.
|
|
US994977A
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Manufacture of color plates or screens for color photography.
|
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GB190821097A
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Improvements in or relating to the Manufacture of Colour Screens or Plates for Photography.
|
|
GB190820971A
|
|
Improvements in or relating to the Manufacture of Colour Plates or Screens for Colour Photography
|
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CA102171A
|
|
Relay for reinforcing sound
|
|
US903811A
|
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Relay for reinforcing sound.
|
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GB190506176A
|
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Improvements in and relating to Relays for Telephones, Telegraphones and the like
|
|
US786629A
|
|
Process of making matches.
|
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GB190311990A
|
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Improved Manufacture of Matches.
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CA366851A
|
|
Photographic developer
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