Improvements in draught preventers. Date of application 26th January 1909. Complete specification left 24th July 1909. Accepted 13th January 1910. Patent no. 1861
Thornton, Thomas1910
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Author:
Imprint:
John G. Wilson, 1910
Local class:
A33.3 (P) THO
Language:
English
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BRN:
3425779
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Total copies: 1