GB 187300307

 

Patent Issued: 1873 January 25

from Chronological and descriptive index of patents applied for and patents granted in 1873, Woodcroft

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from The London Gazette 1873 Feb 7, p. 528.

 

from The London Gazette 1873 April 8, p. 1886.

 

from The London Gazette, Feb 4, 1876 p. 477-478

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