They Invented What? (No. 141)
U.S. Pat. No. 260,379: Grave-signal.
Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is –
1. A grave signal the essential features whereof are a tube leading to the coffin or casket, a signal-flag therein, a spring by which said signal-flag may be forced vertically upward above the top of said tube, and means for releasing said spring which may be operated from the inside of the coffin, substantially as set forth.