历史上最伟大发明的真相
strength of the current to capture variations in voice and sound,” Lemley writes. In this tweak14), he was racing against Thomas Edison. Even Bell’s final product—which combined transmitter, fluctuating current, and receiver—had company. Elisha Gray filed a patent application on the exact same day as Bell, only to lose the patent claim in court. Lemley’s conclusion: “Bell’s iconic s
<<上一页 下一页>>
广州市越秀区图书馆版权所有。
联系电话：020-87673002
本站访问人数：