In 1885 George C. Hale had the bright idea of weaving a zigzag cord into a pair of suspenders. Now if the wearer is trapped in a burning building, he can free the cord, lower it from a window to receive a rope, and escape to safety.
Hale’s patent application says, “I have found by experimenting that from fifty to one hundred feet, or even more, of the cord can be secured to the suspender in the manner heretofore described.”
The application was granted. I wonder if he ever went into business with this.