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how knows any good sites with invention subject ...?

how knows any good sites with invention subject with photos and instructions also ;I will be so glad if i would make them at home....

2006-06-24 15:44:41 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Engineering

1 answers

Try the US Patent Office. Perhaps the FAQ's can help a little.

2006-06-25 13:26:14 · answer #1 · answered by Kes 7 · 0⤊ 0⤋

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