In an 1886 issue of Scientific American, his Karl Löffler’s patent as described as follows:
Cork Puller —Charles Loeffler, Hoboken, N. J.—This invention relates to a cork puller which consists of a thin shank provided at one end with a suitable handle, and at the opposite end with a curved, sharp-edged tooth, in such a manner that by passing said tooth down between the cork and the neck of the bottle and turning it so that the same bears on the under surface of the cork, said cork can be withdrawn without being injured ; and, furthermore, by the very act of passing the tooth down between the neck of the bottle and the cork, said cork is loosened and the operation of withdrawing the same Is facilitated.
In looking back at his patent drawing, it is a pretty straightforward looking piece, but the figure 2. in the drawing is important, as it shows the sharpness of the tooth, as well as the curve of that tooth that will fit in between the neck of the bottle and the curve of the cork.
Several years ago, an example of the Löffler was sold at auction, and that example does look similar to the patent drawing, and the cork puller is marked PATENT on the shaft.
Another example sold on the auction, but it was unmarked. It too looks close to the patent drawing:
with the upper part of the shaft looking closer to the drawing.
That said, in looking at past auction listings, there are several similar tooth-type cork extractors that operate in a similar fashion, with the tooth itself taking on various shapes–thicker, longer, barbed.
Still, we need a Löffler patent in the collection, so if you have a spare on laying about, drop me a line. And, if it is marked Patent, with a Pat. Apld For marking, or better yet with a patent date from 1866, I would be very interested.