Here is a link to the famous sandwich patent application.
(And here is a link to a reference to a discussion about this, or maybe some other, or maybe some apocryphal, sandwich patent: “So why don’t we caption this photo “Martin Khor and his tiresome sandwich patent illustration. If he wasn’t talking about that darned sandwich at the time, he soon would.”)
(Thanks to investigator Charles Bergquist for bringing this to our attention.)