When did martin cooper make the mobile phone?

Cooper is the inventor named on US patent 3906166 "Radio telephone system" filed on October 17, 1973. He is considered the inventor of the first portable handset and the first person to make a call on a portable cell phone on April 3, 1973, to the bewilderment of passers-by in a New York City street. That first call, placed to his rival Joel Engel, Bell Labs' head of research, caused a fundamental technology and communications market shift toward the person and away from the place. It was the incarnation of his vision for personal wireless communications, distinct from cellular car phones. Cooper later revealed that watching Captain Kirk talking in his communicator on the television show Star Trek inspired him to research the mobile phone.

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dr martin cooper invented the cell phone because he saw captain kirk's communicator in star trek
Martin Cooper invented the mobile phone on 1973