Below you can find the Martha coston invented the coston this a device for signaling at sea in the 1850s Jeopardy Words Answer. The answer to Martha coston invented the coston this a device for signaling at sea in the 1850s has 5 letters. This clue belongs to the Inventors & inventions category and is part of Jeopardy Word Level 665. If you scroll near the bottom you will find other clues and answers part of level 665