On this day in 1893 August Lindquist was granted the patent for Grave Alarm. U.S. Patent No. 500,072.
This invention relates to improvements in grave alarms, whereby persons who are prematurely buried before life is extinct, can sound an alarm, thus notifying the cemetery officials of the fact.
The object of this invention, is not only to provide means for surrounding an alarm, but also to provide and improved construction whereby fresh air is supplied to the person prematurely buried, whereby life may be sustained until help arrives.