Today in 1914, US Patent 1100818 A was issued, an invention of Robert O. Boardman, for his “Bottle Cap Remover.” There’s no Abstract, though it’s described this way in the application:

This invention relates to bottle closures. and .more particularly to a device for removing the cap closures from beer bottles, and the like. As is well-known. such cap closures are ordinarily removed by the use of an implement entirely separate and distinct from the cap. Such opening devices are liable to be lost and misplaced, and even, when at hand must be applied to the cap prior to manipulation to pry the cap from it has been proposed to provide, as a substitute for such opening devices, a cap having an integral tongue designed to be grasped by the fingers and pulled to remove the cap, or to provide a cap constructed in sections, arranged to be separated to such an extent as to permit of removal of the cap without the use of the ordinary opener. Such caps, however, present the disadvantage that a special machine is necessary for their manufacture and usually they are not so constructed as to permit of the use of the ordinary capping machine. Furthermore, they are expensive to manufacture and can usually only be manipulated by a person capable of exerting a strong grip.

In connection with the foregoing it is the object of the present invention to provide a bottle cap opener so constructed that it may be readily assembled with the ordinary bottle cap at the time of placing the latter upon the bottle to be sealed, and may be readily and quickly manipulated by anyone for the purpose of prying oil the cap.