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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 5715856 | Liquid flow control apparatus A liquid flow control apparatus (5) suitable for handling milk from a milking machine, comprising a first chamber (10) that comprises an inlet (11) for the milk, an outlet (12) for connecting to a vacuum pump, and an outlet (14) for the milk to flow by gr... | 02/10/1998 |
| 4499854 | Apparatus for conveying milk using an underpressure An apparatus for conveying milk with the help of an underpressure in a pipe system which includes feedpipes comprises damming devices or check valves in the feedpipe, or a division of the feedpipe over at least a portion of its length into several pipes w... | 02/19/1985 |
