Assertion: synchronized tremolo | /r/HasProperty | the device
Facets:
Source sentences:
text: After the Bigsby, the next major development was Leo Fender's synchronized tremolo, the device that introduced the term tremolo arm (US Patent 2741146 filed in 1954, issued in 1956).
text: After the Bigsby, the next major development was Leo Fender's synchronized tremolo, the device which introduced the term tremolo arm.