Patents of invention : origin and growth of the patent system in Britain.
Wedi'i Gadw mewn:
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
London :
Longmans, Green,
[1946]
|
| Pynciau: |
| Disgrifiad Corfforoll: | 48 p. |
|---|