難度在專利,想製造得繳專利費,繳了,就沒利潤。15年後,這些專利都到期了。
所有跟帖:
• 技術在進步,新的專利又來了 -fourwaves- ♂ (0 bytes) () 02/15/2018 postreply 11:16:02
• 技術在進步,新的專利又來了 -fourwaves- ♂ (0 bytes) () 02/15/2018 postreply 11:16:02
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