Report of the departmental committee on the patents and designs acts and practice of the Patent office ...
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| 企业作者: | |
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| 格式: | 图书 |
| 语言: | English |
| 出版: |
London,
H.M. Stationery off.,
1931.
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| 丛编: | Cmd. (Great Britain. Parliament) ;
3829. |
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| Item Description: | At head of title: Board of trade. Charles H. Sargant, chairman. |
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| 实物描述: | 104 p. incl. tables. 25 cm. |