Thank you, Mike.
VERY interesting read!
The following is edited for content.
"The Korn's Patent Mystery"
"On February 8, 1883 George W. Korn of New York was granted German patent number 21125 for his "Korkenzieher." On August 28, 1883 Korn received U. S. Patent Number 283,900 entitled "Cork Turner." The "cork turner" blade is marked KORN'S PATENT. The knife blades are marked HENRY SEARS & SON 1865 (the year founded). The foil cutter is marked REGISTERED. To use it, the long prong is carefully slipped in beside the cork until penetrated by the short prong. Four serrations on the long prong just below the point on the short prong engage the cork. A twist to break the cork free from the bottle wall and a long, slow pull will nicely draw out the cork."
©1998 Donald A. Bull