1401
Recognize the mother of Wifi
(i.imgflip.com)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
Rules
She didn't invent frequency hopping, Nicola Tesla did. She invented a system that used a piano roll (from a player piano) to alternate frequencies. Also she shared the patent with another person.
Or rather she was part of a team, with her husband and one more, that patented that idea, never really got it to work in real torpedos, and the technology was forgotten until someone referred to it in a later patent. Then her role as background got expanded to take the role of other more influential women, maybe because she had a nicer picture.