Today in 1935, US Patent 2005770 A was issued, an invention of Daniel C. Bleser, for his “Hop Extractor.” There’s no Abstract, although in the description it includes this summary:

This invention relates to improvements in hop extracting and has for its main object the provision of a method and apparatus whereby the desirable flavoring and other elements of hops may be extracted: therefrom without also extracting certain rank, bitter principals which are undesirable and objectionable, It is also an object of this invention to provide an improved means for extracting hops which will require less time than the conventional practices now used.