He said that he has not taken out a patent and will not charge for creating the design for the machine.
他声称，因为尚未获取专利，所以他不会为新型浇模机的发明设计而向别人收费。
The first patent ever taken out on a roller skate was for an in-line skate in 1819.
1819年在溜冰鞋去掉的第一个专利是为一只轴向冰鞋。
The first patent ever taken out on a roller skate was for an in-line skate in 1819.
1819年在溜冰鞋去掉的第一个专利是为一只轴向冰鞋。
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