Will it sell? how to determine if your invention is profitably marketable (before wasting money on a patent)
| Yazar: | |
|---|---|
| Materyal Türü: | Kitap |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
Okemos, Mich.
J.E. White & Associates
2000.
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| Konular: |


