Assertion: metronome | /r/HasProperty | patented by johann maelzel
Facets:
value: as a tool for musicians
type: PURPOSE
value: in 1815
type: TEMPORAL
Source sentences:
text: The metronome dates from the early 19th century, where it was patented by Johann Maelzel in 1815 as a tool for musicians, under the title "Instrument/Machine for the Improvement of all Musical Performance, called Metronome".
text: The metronome dates from the early 19th century, where it was patented by Johann Maelzel in 1815 as a tool for musicians, under the title "Instrument/Machine for the Improvement of all Musical Performance, called Metronome".