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: |
CARM 1 Store
| Rhif Galw: |
A2:AD09E0 C01607 |
|---|---|
| Copi 1 | Ar gael Gwneud Cais |