Abridgment class and index key, showing abridgment classes and index headings to which inventions are assigned in the official publications of the Patent Office. Vol. 1 [1927]
Patent Office1927
Books, Manuscripts
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Total copies: 1
Author:
Imprint:
HMSO 1927
Series title:
ISBN:
E000299558 (invalid)
Dewey class:
608
Language:
English
BRN:
2108114
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Total copies: 1